Any man who reads too much and uses his own brain too little falls into lazy habits of thinking.

The whole of science is nothing more than a refinement of everyday thinking.

There is no limit to which a man will not go to avoid thinking.

Thinking is the capital, Enterprise is the way, Hard Work is the solution

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.

Even people who aren't geniuses can outthink the rest of mankind if they develop certain thinking habits.