A man of bad character punishes his own soul.

Does money upset the hearts of learned men? He answered, "men whose hearts are changed by money are not learned"

Never have I dealt with anything more difficult than my own soul, which sometimes helps me and sometimes opposes me.

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.

This visible world is a trace of that invisible one and the former follows the latter like a shadow.

Only that which cannot be lost in a shipwreck is yours.

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.