Similarly, this body is one identity and I am another identity. So knowledge means when we can understand that it is "my body," not "I body." Not this nonsense. Nobody says "I body." Everyone says "my body." This is knowledge. But these rascals, these rascals of modern age, they are saying "I body," "I am this body." What you are? "I am this body." What is your interest? "Now anything which is interested with my body." He's not "I body"; still, he's interested with everything with this bodily relation. There are thousands of girls, women, but a particular woman with whom I have got my bodily relation, that is my wife. That is mine. And combination, the child comes out, "my child." In this way, "my house," "my property," "my body," "my relative," "my friend," "my brother," "my nation," my, my, my, my, my. But the rascal does not understand that the beginning of "my" philosophy has begun from this body.

Lecture given by His Divine Grace A.C. Bhaktivedant Swami Prabhupada Bhagavad-gītā 13.3, August 11,1973.

"Law of nature you cannot disobey. It will be enforced upon you. Just like law of nature, the winter season. You cannot change it. It will be enforced upon you. Law of nature, summer season, you cannot change it, anything. Laws of nature or laws of God, the sun is rising from the eastern side and setting on the western side. You cannot change it, anything. That you have to understand, how laws of nature is going on. That is Kṛṣṇa consciousness, to understand laws of nature. And as soon as speak of laws of nature, we must accept that there is a law maker. Laws of nature cannot develop automatically. There must be some authority on the background. Bhagavad-gītā therefore says in the Tenth Chapter that mayādhyakṣeṇa prakṛtiḥ sūyate sa-carācaram (BG 9.10): "Under My direction, superintendence, the material laws are working."

~Lecture given by His Divine Grace A.C. Bhaktivedant Swami Prabhupada on BG 04.08 - Montreal, june 14-1968.

So our this material society means chewing the chewed. A father gives education to his son to earning livelihood, gets him married and settles him, but he knows that "This kind of business, earning money and marrying, begetting children, I have done, but I am not satisfied. So why I am engaging my son in this business?" This is called chewing the chewed. Chewing the same thing. "I have not been satisfied with this business, but why I am engaging my son also?" The real father is he who does not allow his son to taste the chewing the chewed. That is real father. Pitā na sa syāj jananī na sā syāt, na mocayed yaḥ samupeta-mṛtyum [SB 5.5.18]. This is real contraceptive. A father..., a man should not desire to become a father, a woman should not desire to become a mother, unless they are fit to save the children from the impending clutches of death. That is the duty of father and mother.

Lecture given by His Divine Grace A.C. Bhaktivedant Swami Prabhupada on Śrīmad-Bhāgavatam 3.25.12, Nov 12-1974.

Now, these children, they are now so small. When they'll become young, this body will grow. We do not know... We say, "It is growing," but growing or not growing, this body will not remain. This body will go; another body will come. Medical science also says that every second we are changing blood corpuscles, and therefore change in the body is going on. So you say or I say that "Body is growing," but in the Vedic language it is said that "Body is changing."
Just like a child is born so small from the mother's womb, and it changes body every second. Then he becomes a young child or a boy, then young man, then old man like me, and so on. In this way this changing, body changing, is going on. And the final change is called death. Death means... Just like the too much old garments cannot be used, similarly, this body is the garment of the soul. When it is..., no longer can be used, we have to accept another body.

Lecture at a school given by His Divine Grace A.C.Bhaktivedant Swami Prabhupada on 13 Aug, 1968.

"In a golden cage, there is a bird. If you don't give any food to the bird and simply wash the cage very nicely, oh, there will be always, (imitates bird) 'chi chi chi chi chi'. Why? The real bird is neglected. Simply outward covering. So similarly, I am spirit soul. That I forgot. Ahaṁ brahmāsmi: 'I am Brahman'. I am not this body, not this mind. So people are trying to burnish the body and the mind. First of all they try to burnish the body. This is material civilization. Very nice clothing, very nice food, very nice apartment, very nice car or very nice sense enjoyment—everything is very nice. But that is to this body. And when one is frustrated to this very nice arrangement, then he goes to the mind: poetry, mental speculation, LSD, marijuana, drinking and so many things. These are all mental. Actually, happiness is not there in the body, nor in the mind. Real happiness is in the spirit."

~Lecture given by His Divine Grace A.C. Bhaktivedant Swami Prabhupada SB 07.06.03 - Montreal , june16-1968

"Kṛṣṇa is explaining how one can very easily enter into the spiritual world, or the kingdom of God. The simple formula is that anyone who understands the appearance, disappearance, activities of the Lord as divyam, transcendental, with perfect knowledge of the Absolute Truth, simply by this understanding one can immediately enter into the spiritual kingdom. To know the Absolute Truth is not possible by our present senses. That is also another fact. Because at the present moment we have got materially..., materially affected; not material senses. Our sense are originally spiritual, but it is covered by material contamination. Therefore the process is to purify, to purify the coverings of our material existence. And that is also recommended—simply by service attitude."

~Lecture given by His Divine Grace A.C. Bhaktivedant Swami Prabhupada on BG 04.09 - Montreal,June19-1968.

So we are becoming deviated from God. The more we are advancing in so-called material civilization, we are more becoming far away from God. Therefore Bhaktivinoda Ṭhākura has sung, jaḍa-bidyā yata, māyāra vaibhava, tomāra bhajane bādhā. Jaḍa-bidyā, the material education, they are simply paraphernalia of this illusory energy, māyāra vaibhava. And the effect of this advancement of material civilization means stopping one's relationship with God.
Jaḍa-bidyā yata, māyāra vaibhava, tomāra bhajane bādhā, anitya saṁsāre. Anitya means this temporary life, this... Everyone, we are in this material world, say, for fifty years, sixty years, hundred years. That is temporary. In the unlimited time, a duration of life, say of hundred years, that is nothing. Even, not even a point. It is very temporary, but in this temporary life we are addicted to so many unnecessary things, and we are forgetting our real business.

Lecture given by His Divine Grace A.C. Bhaktivedant Swami Prabhupada
Bhagavad-gītā 6.47,Dec12-1973.

This is the instruction in the Vedic literature, that the people in this material world, they are very, very busy. Not only men---even the animals, even the birds, beasts, insect. We see on the beach, there are so many dogs, and they are assembled there for sex. So this is the material world, indriya-prīti. Therefore śāstra says that human life should be considered. They should think, "Whether we shall spoil our life simply by sense gratification, or there is some other business?" Yes, there is some other business. That is tapasya. That is tapasya means we should restrict sense gratification. Sense gratification, either regulated or nonregulated, is meant for animal life. Sense control is the human life. Therefore you'll find in Vedic culture big, big learned scholars, big, big kings, they dedicated their life for tapasya. Tapo divyaṁ putrakā yena śuddhyet sattvam [SB 5.5.1].

Lecture given by His Divine Grace A.C. Bhaktivedant Swami Prabhupada
Śrīmad-Bhāgavatam 3.25.7
Nov7-1974.

"Kṛṣṇa is known as, therefore, out of His sixty-four qualities, His one quality is bahudak. That is explained in our Nectar of Devotion, you will see. That means He could talk with any living entity. Why not? If He is the father of every living entity, why He is not able to understand the language of every living entity? That is natural. Is it not a fact that a father understands the language of his son? Naturally, if Kṛṣṇa is the father of all living entities, it is natural for Him to understand all the languages of birds, bees, trees, man—everyone. Therefore Kṛṣṇa's another quality is bahudak. This was proved when Kṛṣṇa was present. One day Kṛṣṇa was answering to the speaking of a bird, and one old lady, she came to take water from the Yamuna, and when she saw that Kṛṣṇa was talking with a bird, she became amazed: "Oh, Kṛṣṇa is so nice."

~Lecture given by His Divine Grace A.C. Bhaktivedant Swami Prabhupada SB 06.02.46 - Prayag
Jan 30-1971.

"Every living entities is fit for enjoying, because he's part and parcel of God. Because he is part and parcel, he's also enjoyer, although in the minute quantity. But he can enjoy in association with God. So in order to enter into the association of God, he has to purify himself. Yasmād brahma-sau... Brahma, brahma-saukhyam. Brahma means the unlimited, or spiritual. Spiritual means unlimited, unending, eternal—the greatest. These are some of the meanings of brahma. So you are searching after pleasure; that is your prerogative. That is your right. You must be. But you are searching in this sense gratificatory platform, you'll never get it. If you purify your this existence, then you get unlimited pleasure in your spiritual existence."

~Lecture given by His Divine Grace A.C. Bhaktivedant Swami Prabhupada SB 05.05.01 - Los Angels
Jan20-1969.

"God is always beside us, present in our hearts. When we leave the body, God also goes with us, and when we take on another body, He goes with us there just to see what we are doing. When shall we turn our face toward Him? He is always waiting. As soon as we turn our face toward God, He says, “My dear son, come on – sa ca mama priyaḥ – you are eternally dear to Me. Now you are turning your face to Me, and I am very glad.”

~Book:On The Way To Kṛṣṇa
By His Divine Grace A.C. Bhaktivedant Swami Prabhupada

"Kṛṣṇa is saying that all the men who come to Him – whether they be distressed, in need of money, curious, etc. – are welcomed, but out of them the person who is in knowledge is very dear to Him. The others are welcomed because it is understood that in course of time, if they continue on the path to God, they will become as good as the man of knowledge."

~Book:On The Way To Kṛṣṇa
By His Divine Grace A.C. Bhaktivedant Swami Prabhupada

Everyone is enjoying or suffering the sequence of his karma. Yas tu gopam. Indra-gopa, a small insect. Its name is indra-gopa. Beginning from this indra up to that Indra, the king of heaven, everyone is enjoying and suffering about his karma. Yas tv indra-gopam athavendram aho sva-karma. Sva-karma, one's own activities, we are creating. We are creating our next body in this life. As we have got this life as the resultant action of my past karma, similarly, I am creating another body after death, on account of my present karma. This is going on.
So we should work in such a way that we may not get another body next life. That is wanted. That is wanted.

Lecture given by His Divine Grace A.C. Bhaktivedant Swami Prabhupada on
Śrīmad-Bhāgavatam 3.25.2
Nov 2-1974