人類心智形成和操縱符號的能力使我們區(qū)別于其他動物。
The capacity of the human mind for forming and manipulating symbols is what sets us apart from other animals.
The only thing that matters is how you feel about yourself.
要理解行為，就要尋找其中的效用。
Sustainability is not a choice; it's an imperative for long-term success.
The only way to improve is to challenge yourself against the best.
The world only exists in your eyes. You can make it as big or as small as you want.