"I don't think of my work as being for children or for adults. I just think of it as being."

处于困境中的人往往只关注自己的问题，而解决问题的途径通常在于你如何解决别人的问题。

Innovation in coal technology is just as important as innovation in any other energy sector.

History will be kind to me for I intend to write it.

The founders of a new colony, whatever Utopia of human virtue and happiness they might originally project, have invariably recognized it among their earliest practical necessities to allot a portion of the virgin soil as a cemetery, and another portion as the site of a prison.

I'm a work in progress, and I'm okay with that.

Success is not about how much money you make, it's about the difference you make in people's lives.

The only limit to our realization of tomorrow will be our doubts of today.

If liberty means anything at all, it means the right to tell people what they do not want to hear.