What need is there to say more? The childish work for their own benefit, The Buddhas work for the benefit of others. Just look at the difference between them.
ShantidevaPassion is overcome only by him who has won through stillness of spirit the perfect vision; it comes through the contentment that is regardless of the world.
ShantidevaAll the suffering in the world comes from seeking pleasure for oneself. All the happiness in the world comes from seeking pleasure for others.
Shantideva