If a person has ten habits out of which nine are good and one bad, that bad one will destroy the good ones.
Seek knowledge and teach it to people. Learn dignity and tranquillity, and be humble towards those from whom you learn knowledge and be humble towards those to whom you teach it, and do not be tyrannical scholar otherwise your knowledge cannot be established because of your tyranny.
He who does now know evil will fall into it.
He who keeps his own counsel keeps his affairs in his own hands.
Do not be misled by hearing of anyone's reputation.
Allah loves moderation and hates extravagance and excess.