Spring makes everything young again except man.

The rose does not bloom without thorns. True, but would that the thorns did not outlive the rose.

[In plotting earthquake measurements] the range between the largest and smallest magnitudes seemed unmanageably large. Dr. Beno Gutenberg then made the natural suggestion to plot the amplitudes logarithmically.

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

The usual designation of the magnitude scale to my name does less than justice to the great part that Dr. Gutenberg played in extending the scale to apply to earthquakes in all parts of the world.

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

It is a common remark that men talk most who think least; just as frogs cease their quacking when a light is brought to the water-side.