Whoever desires Paradise, proceeds towards goodness; whoever fears Hell, refrains from the impulses of passions; whoever believes firmly in death, detests wordly life; and whoever recognises the worldly life, the trials and tribulations (of life) become slight for him.
Ali ibn Abi TalibKnowledge is of two kinds: that which is absorbed and that which is heard. And that which is heard does not profit if it is not absorbed.
Ali ibn Abi Talib