We cannot advance without new experiments in living, but no wise man tries every day what he has proved wrong the day before.

Age acquires no value save through thought and discipline

Lincoln was not great because he was born in a log cabin, but because he got out of it

There is so much good in the worst of us, and so much bad in the best of us, that it ill behaves any of us to find fault with the rest of us.

Our minds thus grow in spots; and like grease spots, the spots spread. But we let them spread as little as possible: we keep unaltered as much of our old knowledge, as many of our old prejudices and beliefs, as we can.

There are obviously two educations. One should teach us how to make a living and the other how to live. Surely these should never be confused in the mind of any man who has the slightest inlinkng of what culture is. For most of us it is essential that we should make a living... In the complications of modern life and with our increased accumulation of knowledge, it doubtless helps greatly to compress some years of experience into far fewer years by studying for a particular trade or profession in an institution.

Any astronomer can predict with absolute accuracy just where every star in the universe will be at 11.30 tonight. He can make no such prediction about his teenage daughter.