Truth, like gold, is not less so for being newly brought out of the mine.

If by gaining knowledge we destroy our health, we labour for a thing that will be useless in our hands.

Whoever uses force without Right ... puts himself into a state of War with those, against whom he uses it, and in that state all former Ties are canceled, all other Rights cease, and every one has a Right to defend himself, and to resist the Aggressor.

Don't tell me what I can't do!

In the beginning, all the world was America.

In my opinion, understanding who your target audience is, and what they want, and writing to them (and only them!) is the most important component of being successful as an author.

The Commonwealth of Learning is not at this time without Master-Builders, whose mighty Designs, in advancing the Sciences, will leave lasting Monuments to the Admiration of Posterity; But every one must not hope to be a Boyle, or a Sydenham; and in an Age that produces such Masters, as the Great-Huygenius, and the incomparable Mr. Newton, with some other of that Strain; 'tis Ambition enough to be employed as an Under-Labourer in clearing Ground a little, and removing some of the Rubbish, that lies in the way to Knowledge.