如果你不放弃，你还有机会。放弃是最大的失败。
If you don't give up, you still have a chance. Giving up is the greatest failure.
To this day, I have never taken a course anywhere, in chemistry, economics, psychology, or business.
时至今日，我从未在任何地方选修过化学、经济学、心理学或商业课程。
实现明天理想的唯一障碍是今天的疑虑。
哲学史不是思想的博物馆，而是批判性思维的生命传统。