I would walk - not run - to the nearest seismograph.

Don't wait for extraordinary circumstance to do good; try to use ordinary situations.

it is good to have measured myself, to recognize my limitations.

Nothing is less predictable than the development of an active scientific field.

There is nothing more beautiful than cheerfulness in an old face, and among country people it is always a sign of a well-regulated life.

I have a sense of humor; but over the years that sense has developed one blind spot. I can no longer laugh at ignorance or stupidity. Those are our chief enemies, and it is dangerous to make fun of them.

According to Democritus, truth lies at the bottom of a well, the water of which serves as a mirror in which objects may be reflected. I have heard, however, that some philosophers, in seeking for truth, to pay homage to her, have seen their own image and adored it instead.