Can a sparrow know how a stork feels?

Experience is only half of experience.

Do people conform to the instructions of us old ones? Each thinks he must know best about himself, and thus many are lost entirely.

Let no one be ashamed to say yes today if yesterday he said no. Or to say no today if yesterday he said yes. For that is life. Never to have changed-what a pitiable thing of which to boast!

A good man, through obscurest aspirations Has still an instinct of the one true way.

To make a young couple love each other, it is only necessary to oppose and separate them.

Should I not be proud, when for twenty years I have had to admit to myself that the great Newton and all the mathematicians and noble calculators along with him were involved in a decisive error with respect to the doctrine of color, and that I among millions was the only one who knew what was right in this great subject of nature?