There is no comparison between that which is lost by not succeeding and that which is lost by not trying.
Why should a man be in love with his fetters, though of gold?
I would live to study, not study to live.
For first of all we must prepare a Natural and Experimental History, sufficient and good; and this is the foundation of all; for we are not to imagine or suppose, but to discover, what nature does or may be made to do.
Custom is the principle magistrate of man's life.
If a man will begin with certainties, he shall end in doubts, but if he will content to begin with doubts, he shall end in certainties.