The greatest obstacle to being heroic is the doubt whether one may not be going to prove one's self a fool; the truest heroism is to resist the doubt; and the profoundest wisdom, to know when it ought to be resisted, and when it be obeyed.

【译文】 颜渊感叹地说：“老师的学问越仰望越觉得高耸，越钻研越觉得深厚；看着就在前面，忽然却在后面。老师步步引导，用知识丰富我，用礼法约束我，想不学都不成。

林业不是开采，而是按照自然时间尺度进行的培育。

Art should be dangerous - it should make you feel something.

下定决心果断行动，并承担后果；犹豫永远无法成就任何好事。