There is no such whetstone, to sharpen a good wit and encourage a will to learning, as is praise.

There is no such whetstone, to sharpen a good wit and encourage a will to learning, as is praise.

没有一种磨刀石像表扬一样，能磨砺人的才智，鼓励人的学习意志。

-- Roger Ascham 罗杰·阿斯坎