Nakedness is uncomely, as well in mind as body, and it addeth no small reverence to men's manners and actions if they be not altogether open. Therefore set it down: That a habit of secrecy is both politic and moral.
The human understanding is of its own nature prone to suppose the existence of more order and regularity in the world than it finds. And though there be many things in nature which are singular and unmatched, yet it devises for them parallels and conjugates and relatives which do not exist. Hence the fiction that all celestial bodies move in perfect circles, spirals and dragons being (except in name) utterly rejected.
Again there is another great and powerful cause why the sciences have made but little progress; which is this. It is not possible to run a course aright when the goal itself has not been rightly placed.
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.
Believing that I was born for the service of mankind, and regarding the care of the commonwealth as a kind of common property which, like the air and the water, belongs to everybody, I set myself to consider in what way mankind might be best served, and what service I was myself best fitted by nature to perform.