The trouble with most people is that they quit before they start.

High thinking is inconsistent with a complicated material life based on high speed and imposed on us by mammon worship.

To do much clear thinking a person must arrange for regular periods of solitude when they can concentrate and indulge the imagination without distraction.

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

The best thinking has been done in solitude. The worst has been done in turmoil.

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.