So why do I talk about the benefits of failure? Simply because failure meant a stripping away of the inessential. I stopped pretending to myself that I was anything other than what I was, and began to direct all my energy into finishing the only work that mattered to me.

Quality is free. It's not a gift, but it's free. What costs money are the unquality things -- all the actions that involve not doing jobs right the first time.

Every book is a door to a new world, a new perspective, a new understanding of life and existence.

You must not think that what is hard for you to master is humanly impossible； and if it is humanly possible， consider it to be within your reach.