If you find that somebody is not grateful for all that you have done for him, then do not get disappointed because often you will find that someone else feels under your obligation though you have done nothing for him and thus your good deeds will be compensated, and Allah will reward you for your goodness.
Ali ibn Abi TalibOh writer! An Angel watches over all you write. Make your writing meaningful for it will eventually return to you and you will be questioned about what you wrote.
Ali ibn Abi TalibDuring civil disturbance adopt such an attitude that people do not attach any importance to you - they neither burden you with complicated affairs, nor try to derive any advantage out of you.
Ali ibn Abi Talib