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

There are obviously two educations. One should teach us how to make a living and the other how to live.

The American Dream is that dream of a land in which life should be better and richer and fuller for everyone, with opportunity for each according to ability or achievement.

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

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.

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