Greed is permanent slavery

There is no capital more useful than intellect and wisdom, and there is no indigence more injurious than ignorance and unawareness.

He who guards his secrets retains control in his own hands

Blessed is he whose own faults keep him from seeing the faults of others.

He who is greedy is disgraced; he who discloses his hardship will always be humiliated; he who has no control over his tongue will often have to face discomfort.

Happiness comes towards those which believe in him

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.