Two things illuminate the heart:

1. Asking for forgiveness [from Allaah].
2. Remembering Allaah.

Source: al-Wabil as-Sayyib by Imam Ibn al-Qayyim (p. 92)

Ibn Taymiyyah said:

"The heart was only created for the remembrance of Allāh."

‎● {مجموع الفتاوى ٣١٢/٩}

• Eyes of the heart 📚

It is reported that Khālid b. Ma’dān – رحمه الله – said: “There is not a person except he has four eyes: two in his head with which he sees the matters of this worldly life, and two in his heart with which he looks to the matters of the hereafter. So if Allāh wants good for his servant, He opens his heart’s eyes, and so he perceives what he has been promised in the unseen world. Thus he is saved from the unseen (punishment) through the unseen (reward for the obedient).”

● [سير أعلام النبلاء ٤\٥٤٣]

https://t.me/+lqDEkv1SmitlMDE0

^The telegram channel for the class

Shaykh Al-Islām Ibn Taymiyyah (رحمه الله) said:

“One who enjoins good must have three qualities:

1 - Knowledge,
2 - Gentleness, and
3 - Patience.

Knowledge comes before it, gentleness comes during it, and patience comes after it.”

Reference: Al-Amr bil Ma’rūf li-Ibn Taymīyyah 1/20

Allāh's Messenger ﷺ said:
"A man will be brought on the Day of Resurrection and will be cast into Hell: his intestines will pour forth and he will go round them as a donkey goes round a millstone."

The inmates of Hell will gather round him and say: "What has happened to you, O so-and-so? Were you not enjoining us to do good and forbidding us to evil?"

He will reply: "I was enjoying you to do good, but was not doing it myself; and I was forbidding you to do evil, but was doing it my self."

● (صحيح مسلم ٢٩٨٩)

Jaf'ar al-Sadiq said: "Be a conveyor of Islaam, an enjoiner of the good, a forbidder of evil, and generous to the one who seeks assistance."

‎● {سير أعلام النبلاء حجم ٦، صحفة ٢٦٣}

وَلْتَكُن مِّنكُمْ أُمَّةٌۭ يَدْعُونَ إِلَى ٱلْخَيْرِ وَيَأْمُرُونَ بِٱلْمَعْرُوفِ وَيَنْهَوْنَ عَنِ ٱلْمُنكَرِ ۚ وَأُو۟لَٰٓئِكَ هُمُ ٱلْمُفْلِحُونَ

And let there be [arising] from you a nation inviting to [all that is] good, enjoining what is right and forbidding what is wrong, and those will be the successful. • [3:104]

Shaykh Muḥammad ibn 'Al al-Laṭīf āl ash-Shaykh رحمه الله said: "Knowing that enjoining good and forbidding evil does not cut off provisions nor does it bring an appointed term (i.e. death) closer.

Rather, it may lengthen an appointed term and increase provisions for, indeed, blessings come about, calamities are repelled and illness and disease are taken away by way of it.

So, fulfil your duty [and] your blessing will be completed and you will be kings in Jannah.

● [الدرر السنية ٣١٣/١٤]