Dumbness and silence are two different things.

A superstition is a premature explanation that overstays its time.

Is any knowledge worthless? Try to think of an example.

Boundaries which mark off one field of science from another are purely artificial, are set up only for temporary convenience. Let chemists and physicists dig deep enough, and they reach common ground.

Evolution pays and that is why there is evolution

A man's own addition to what he learns is cement to bind an otherwise loose heap of stones into a structure of unity, strength, and use.

Degree is much: the whole Atlantic might be lukewarm and never boil us a potato.