天下事，有可为者，有不可为者，知其不可为而为之，愚也。
世间之事，有的可以做，有的不可以做，明知不可为而为之，是愚蠢的行为。
学会进行20分钟的小憩而不感到不自然。
Man is not logical and his intellectual history is a record of mental reserves and compromises. He hangs on to what he can in his old beliefs even when he is compelled to surrender their logical basis.
潜意识是未曾付诸文字的人类洪荒时代史。