雪人在我的想象中早已存在，远早于他出现在纸上。

解释：人有知识，犹如树木有枝叶，树木有了枝叶，能带给人阴凉，人有了知识，就可以为人民做更多的事。

就这样吧。

"Mental life is a continuous adjustment to the environment."

The money and effort that men expend on their bodies, they might with greater profit devote to their minds.

【讲解】：有了过错而不改正，这才真叫过错呢。