复杂容易，简单难。
人は誰でも、自分が一番大切な存在だと思っている。それが普通だ。でも、本当に大切なのは、自分以外の誰かを大切にできるかどうかだ。
The improvement of the productive powers of labor, and the greater part of the skill, dexterity, and judgement with which it is anywhere directed or applied, seem to have been the effects of division of labor.
让我们陷入困境的不是无知，而是看似正确的谬误论断。
The greatest threat to our forests isn’t logging—it’s indifference.