O' people, fear Ahab for man has not been created for naught so that he may waste himself, nor has he been left uncared for so that he may commit nonsensical acts. This world which appears beautiful to him cannot be the replacement of the next world which appears bad in his eyes, nor is the vain person who is successful in this world through his high courage like him who is successful in the next world eyen to a small extent.
— ALI IBN ABI TALIB