学书三境界
Three Stages of Learning
若思通楷则,少不如老；学成规矩，老不如少。思则老而愈妙，学乃少而可勉。勉之不己，抑有三时；时然一变，极其分矣。至如初学分布，但求平正；既知平正，务追险绝；既能险绝，复归平正。初俏未及，中则过之，后乃通会，通会之际，人书俱老。
I have also found that it is more suitable for youth than for old age to learn the rudiments and easier for old age than for youth to master this art. That is because thinking, as implied in the former, is the fruit of maturity, and endeavour, as required in the latter, is the seed for the young to f^ow. Endeavour must pass three stages in succession to prove its full virtue.So the beginner should first aim at conformity and moderation, after that he goes upon perilous ways, and later comes to moderation and conformity once more. During the first stage, he does not reach high enough to the point, During the second, he hits above it; but at last, the arrow sticks trembling in the bull's eye. When the artist enters upon the last stage, hoth himself and his art become silvered with age.