我们的英雄是人类，这是一个崭新的情况。历史中大部分的社会重心都是敬拜一位人类以外的灵体，神，自然力、宇宙，总之是人类以外的什么。我们逐渐失去了这种习惯，我想这也是我们越来越被大自然吸引的原因。
Our heroes are human heroes. That's a very new situation. Most other societies have had, right at their center, the worship of something transcendent: a god, a spirit, a natural force, the universe, whatever it is -- something else that is being worshiped. We've slightly lost the habit of doing that, which is, I think, why we're particularly drawn to nature.
I define nothing. Not beauty, not patriotism. I take each as it comes, and I leave it as it goes.
It's not always about winning. It's about learning and getting better.
教学的艺术不在于传授本领，而在于激励、唤醒和鼓舞。
儿童首先发挥功能的是感觉器官。
Psychology must be based on observable phenomena, not abstractions.
True happiness comes from inner fulfillment.