Khwaja Abdullah Ansari quotes:

Four things are destroyed by the other fours: kindness by ingratitude, strength (of government) by crime, power by power and human love by arrogance.

Can you walk on water? You have done no better than a straw. Can you fly through the air? You are no better than a gnat. Conquer your heart-then you may become somebody.

Treat others as thou wouldst be treated. What thou likest not for thyself, dispense not to others.