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

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

No joy in nature is so sublimely affecting as the joy of a mother at the good fortune of a child.

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.

Only fools, liars, and charlatans predict earthquakes

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