Beware of those who would use violence, too often it is violence they want and neither truth nor freedom.

Today is all we have, tomorrow is a mirage that may never become reality.

To pursue a man effectively, it is best to begin with his thinking.

Knowledge is awareness, and to it there are many paths, not all of them paved with logic.

Trade is much superior to piracy. You can rob and kill a man but once, but you can cheat him again and again.

Books are the perfect Time Machine. By the simple act of opening a book you can, in an instant, be travelling up a jungle river without once being bitten by mosquitoes, or you can almost die of thirst in the desert while holding a cold drink in your hand, or dine in the finest restaurants and never have to worry about paying the bill, or ride the wild country of our western frontier and never worry about losing your scalp to a raiding party.

No memory is ever alone; it's at the end of a trail of memories, a dozen trails that each have their own associations.