But by far the greatest obstacle to the progress of science and to the undertaking of new tasks and provinces therein is found in this-that men despair and think things impossible.
Money is a good servant, a dangerous master.
We only have our nervous system to paint.
[Science is] the labor and handicraft of the mind.
In nature things move violently to their place, and calmly in their place.
For the chain of causes cannot by any force be loosed or broken, nor can nature be commanded except by being obeyed.