Prophet ﷺ said: "Whoever wishes to know what Allāh has prepared for him, then he should look at what he has prepared for Allāh."

‎● [صحيح الجامع ٦٠٠٦]

Ibn Qayyim رحمه الله said: "The keys to the life of the heart lie in:

١. Reflecting upon the Qur'ān.
٢. Being humble before Allāh in secret.
٣. Leaving sins.

‎● {هدي الارواح الى بلاد الافراح صحفة ٤٥}

ʿAlī b. Abī Ṭālib رضي الله عنه said:

"Mention what you will of the greatness of Allāh, but Allāh is greater than anything you say.

And mention what you will of the Fire, but it is more severe than anything you say.

And mention what you will of Paradise, but it is better than anything you say."

‎● [الـمـجـالـسـة و جـواهـر الـعـلـم ٨٥٣]