Purposive behavior in animals and men.
动物和人类的有目的行为。
The writer's only responsibility is to his art.
言语是智者的筹码，他们只是用它们来计算；但它们是愚人的金钱。
友谊是人生最珍贵的财富。
The forest doesn't need us, but we need the forest—our survival depends on it.
If a doctrine is not unintelligible, it has to be vague; and if neither unintelligible nor vague, it has to be unverifiable.
Love is the answer, and you know that for sure.