正是通过观察和思考的力量，人们才能找到方法。所以我们必须不断挖掘和钻研。
It's on the strength of observation and reflection that one finds a way. So we must dig and delve unceasingly.
One cannot think well, love well, sleep well, if one has not dined well.
未来的目标是完全失业，这样我们就可以玩了。
The highest manifestation of life consists in this: that a being governs its own actions. A thing which is always subject to the direction of another is somewhat of a dead thing.
我们最大的弱点在于放弃。成功最可靠的方法就是再多尝试一次。
没有必要把生活看得太严肃。你永远无法活着离开它。