Human nature is evil; its goodness is the result of conscious activity. Now, the nature of man is such that he is born with a love of profit. If he follows this nature, then strife and greed arise, and courtesy and yielding disappear.
A warped piece of wood must wait until it has been steamed and forced before it can be made straight. Blunt metal must wait until it has been whetted on a grindstone before it can become sharp. Similarly, since human nature is evil, it must wait for the instructions of a teacher before it can become upright.
Full text not yet available.