I discovered this lovely poem by my friend Chade-Meng Tan, in his book Search Inside Yourself:

The Lazy Bodhisattva

With deep inner peace,
And great compassion,
Aspire daily to save the world.
But do not strive to achieve it.
Just do whatever comes naturally.
Because when aspiration is strong
And compassion blossoms,
Whatever comes most naturally,
Is also the right thing to do.
Thus you,
The wise compassionate being,
Save the world while having fun.