Man must be the master of his behavior; he should not be led away, by the impulse of the moment; he must be conscious always of what is good for him. He should so carry on his daily tasks, that he does not make others suffer or suffer himself. That is the sign of intelligent living. You should not give away to fit of anger or grief or elation or despair.
(From : Sai Veda, The Word of God, sayings of Bhagavan Sri Sathya Sai Baba)