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.
ShantidevaWhy be unhappy about something if it can be remedied? And what is the use of being unhappy about something if it cannot be remedied?
ShantidevaAs long as space abides and as long as the world abides, so long may I abide, destroying the sufferings of the world.
Shantideva