The only limit to our realization of tomorrow is our doubts of today.

我不是完美主义者，但我喜欢把事情做好的感觉。

I've been waiting more than 30 years to say this: "Dad, I always told you I'd come back and get my degree." I want to thank Harvard for this timely honor. I'll be changing my job next year…and it will be nice to finally have a college degree on my resume.

Every book is a journey, and every journey is a book.

解析：反对将心与理、物分开。