Not in opinion but in nature is law founded.

These studies are a spur to the young, a delight to the old: an ornament in prosperity, a consoling refuge in adversity; they are pleasure for us at home, and no burden abroad; they stay up with us at night, they accompany us when we travel, they are with us in our country visits.

The following passage is one of those cited by Copernicus himself in his preface to De Revolutionibus: "The Syracusan Hicetas, as Theophrastus asserts, holds the view that the heaven, sun, moon, stars, and in short all of the things on high are stationary, and that nothing in the world is in motion except the earth, which by revolving and twisting round its axis with extreme velocity produces all the same results as would be produced if the earth were stationary and the heaven in motion. . . ."

There is no one who can give you wiser advice than you can give yourself: you will never make a slip, if you listen to your own heart.

Judge not by the number, but by the weight.

In a promise, what you thought, and not what you said, is always to be considered.

Nature has circumscribed the field of life within small dimensions, but has left the field of glory unmeasured.