君子博學，患其不習。
A man of quality studies widely, fearing only that he will be unable to go over what he has learned.
既習之，患其不能行之。
Having gone over what he has learned, he fears only that he will be unable to put it into practice.
既能行之，患其不能以讓也。
Having put it into practice, he fears only that he will be unable to use what he has gained to yield to others.