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.

All I have to do is think and not be influenced by other.

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.

There is nothing either good or bad but thinking makes it so.

The man who doesn't make up his mind to cultivate the habit of thinking misses the greatest pleasure in life.