Patience and tenacity of purpose are worth more than twice their weight of cleverness.
No mistake is so commonly made by clever people as that of assuming a cause to be bad because the arguments of its supporters are, to a great extent, nonsensical
Every great advance in natural knowledge has involved the absolute rejection of authority.
The secret of genius is to carry the spirit of childhood into maturity
There is the greatest practical benefit in making a few failures early in life.
Science is simply common sense at its best that is, rigidly accurate in observation, and merciless to fallacy in logic.
If a little knowledge is dangerous, where is the man who has so much as to be out of danger?
Science commits suicide when it adopts a creed.