Johnson had been the most powerful man in the world, yet the North Vietnamese and the Vietcong had resisted, overcome his power, broken his will.

My first book was the book that changed my life.

In the 19th century, we devoted our best minds to exploring nature. In the 20th century, we devoted ourselves to controlling and harnessing it. In the 21st century, we must devote ourselves to restoring it.

Friendships are different from all other relationships. Unlike acquaintanceship, friendship is based on love. Unlike lovers and married couples, it is free of jealousy. Unlike children and parents, it knows neither criticism nor resentment. Friendship has no status in law. Business partnerships are based on a contract. So is marriage. Parents are bound by law. But friendships are freely entered into, freely given, and freely exercised.

I've always tried to be fair to my subjects. That's easy when they are as likable and admirable as Lewis and Clark, or Eisenhower.

Almost everything Truman did in foreign affairs I approve of.

Friends never cheat on each other, or take advantage, or lie. Friends do not spy on one another, yet they have no secrets. Friends glory in each other's successes and are downcast by the failures. Friends minister to each other, nurse each other. Friends give to each other, worry about each other, stand always ready to help. Perfect friendship is rarely achieved, but at its height it is an ecstasy.