With a stout heart, a mouse can lift an elephant.
More Tibetan Proverbs:
If peace reigns in the land, a nun can govern it.Tibetan
By pride one causes virtue to decline.
Tibetan
My enemy's liver is the sheath of my sword.
Tibetan
Any fool can say "Ah" -- you need intelligence to say "Yes."
Tibetan
Thieves never steal bells.
Tibetan
The unfortunate would be bitten by toothless dogs.
Tibetan