If any human being earnestly desire to push on to new discoveries instead of just retaining and using the old; to win victories over Nature as a worker rather than over hostile critics as a disputant; to attain, in fact, clear and demonstrative knowlegde instead of attractive and probable theory; we invite him as a true son of Science to join our ranks.
Men of noble birth are noted to be envious towards new men when they rise. For the distance is altered, and it is like a deceit of the eye, that when others come on they think themselves go back.
Above all, believe it, the sweetest canticle is Nunc dimittis, when a man hath obtained worthy ends and expectations. Death hath this also, that it openeth the gate to good fame, and extinguisheth envy.
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.
He that gives good advice, builds with one hand; he that gives good counsel and example, builds with both; but he that gives good admonition and bad example, builds with one hand and pulls down with the other.