Optimism is the faith that leads to achievement. Nothing can be done without hope and confidence.

I have never believed that my limitations were in any sense punishments or accidents. If I had held such a view, I could never have expected the strength to overcome them.

Fear: the best way out is through.

Reality even when it is sad is better than illusions. Illusions are at the mercy of any winds that blow. Real happiness must come from within, from a fixed purpose and faith in one's fellow men.

I have often been asked, Do not people bore you? I do not understand quite what that means. I suppose the calls of the stupid and curious, especially of newspaper reporters, are always inopportune. I also dislike people who try to talk down to my understanding. They are like people who when walking with you try to shorten their steps to suit yours; the hypocrisy in both cases is equally exasperating.

What induces a child to learn but his delight in knowing?

You will succeed if you persevere; and you will find joy in overcoming obstacles.