Throughout the ages there have always been those who have been willing to go beyond the norms and reach for that unknown and distant star.

Men are conservatives when they are least vigorous, or when they are most luxurious. They are conservatives after dinner, or before taking their rest; when they are sick or aged. In the morning, or when their intellect or their conscience has been aroused, when they hear music, or when they read poetry, they are radicals.

To make knowledge valuable, you must have the cheerfulness of wisdom.

The man (or woman) who can make hard things easy is the educator.

The use of literature is to afford us a platform whence we may command a view of our present life, a purchase by which we may move it....we see literature best from the midst of wild nature, or from the din of affairs, or from a high religion. The field cannot be well seen from within the field.

No man has a right perception of any truth, who has not been reacted on by it, so as to be ready to be its martyr.

No one can read the history of astronomy without perceiving that Copernicus, Newton, Laplace, are not new men, or a new kind of men, but that Thales, Anaximenes, Hipparchus, Empodocles, Aristorchus, Pythagorus, Oenipodes, had anticipated them.