我是自由的，那就是我迷失的原因。

Optimists tend to interpret their troubles as transient, controllable, and specific to one situation. Pessimists, on the other hand, believe that their troubles last forever, undermine everything they do, and are uncontrollable.

解释：所谓把粮食积存在取之不尽的粮仓里，就是要努力从事粮食生产。