Success is a matter of adjusting one's efforts to obstacles and one's abilities to a service needed by others.

As a young man, I was very interested in how people lived in earlier times; how they got from place to place, lighted their homes, cooked their meals and so on. So I went to the history books. Well, I could find out all about kings and presidents; but I could learn nothing of their everyday lives. So I decided that history is bunk.

Records can be destroyed if they do not suit the prejudices of ruling cliques, lost if they become incomprehensible, distorted if a copyist wishes to impose a new meaning upon them, misunderstood if we lack the information to interpret them. The past is like a huge library, mostly fiction.

The object of education is not to fill a man's mind with facts; it is to teach him how to use his mind in thinking.

I could use a hundred people who don't know there is such a word as impossible.

If someone betrays you once, it is his fault. If he betrays you twice, it is your fault. Blessed are those who can laugh at themselves, they will never cease to be amused. Obstacles are those frightful things you see when you take your eyes off your goals.

Any colour - so long as it's black.