The best revenge is to improve yourself.
"The best form of devotion to the service of Allah is not to make a show of it."
Be afraid of a dignified man when he is hungry and a wicked man when his belly is full.
Know thyself, and thou shalt know God.
The word of God is the medicine of the heart.
A True friend is one who sees a fault, gives you advice and who defends you in your absence.