Thinking is the hardest work there is, which is probably the reason so few engage in it.

Hard knocks have a place and value, but hard thinking goes farther in less time.

I have been influenced in my thinking by both west and east.

I am neither bitter nor cynical but I do wish there was less immaturity in political thinking.

That's been one of my mantras - focus and simplicity. Simple can be harder than complex: You have to work hard to get your thinking clean to make it simple. But it's worth it in the end because once you get there, you can move mountains.

What makes a song last is real content from a mind that is thinking a little bit harder about certain things. A lot of artists don't really think that hard.