You must convince your heart that whatever Allah has decreed is most appropriate and most beneficial for you.

Whoever determines the truth from people alone will remain lost in the plains of bewilderment. Rather, know the truth, and you will know its people.

Whoever says that all music is prohibited, let him also claim that the songs of birds are prohibited.

O youth.......be assured that knowledge alone does not strengthen the hand......Though a man read a hundred thousand scientific questions and understood them or learned them, but did not work with them---They do not benefit him except by working.....Knowledge is the tree, and working is its fruit; and though you studied a hundred years and assembled a thousand books, you would not be prepared for the mercy of Allah the Exalted except by working.

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

Do not dispute with anyone in any matter as far as possible. For in argumentation lies much harm and its evil is greater than its benefit.

Understand that for every rule which I have mentioned from the Quran, the Devil has one to match it, which he puts beside the proper rule to cause error.