Whoever passes forty without his virtue overpowering his vice, let him get ready for hellfire. This advice contains enough for people of knowledge.

The essence of knowledge is to know what obedience and worship are -Abu Hamid al

Declare your jihad on thirteen enemies you cannot see - Egoism, Arrogance, Conceit, Selfishness, Greed, Lust, Intolerance, Anger, Lying, Cheating, Gossiping and Slandering. If you can master and destroy them, then will be ready to fight the enemy you can see.

It is sometimes said that we drink our religion with our mother's milk.

Do not allow your heart to take pleasure with the praises of people, nor be saddened by their condemnation.

When you have a bad suspicion about a Muslim in your heart, you should increase your consideration toward him and make dua for him. This way you will infuriate Satan and will be able to drive him away. Because of this, Satan will be reluctant to put evil thoughts into your heart, afraid that you would increase your consideration towards your brother and will make dua for him again.

Men have such a good opinion of themselves, of their mental superiority and intellectual depth; they believe themselves so skilled in discerning the true from the false, the path of safety from those of error, that they should be forbidden as much as possible the perusal of philosophic writings.