Riding a horse in one leap, you can't walk ten steps, and there's nothing you can do. Perseverance, rotten wood can't be carved; Perseverance, the stone can be carved. Earthworms do not have the advantages of minions, and their bones and muscles are strong. They eat the earth and drink the yellow land with their hearts. The crab kneels six times and pinches twice. It's not that no one sent it to the snake hole, but it's also impetuous.

From: Xunzi's Persuasion