The work of science is to substitute facts for appearances, and demonstrations for impressions.

The very cheapness of literature is making even wise people forget that if a book is worth reading, it is worth buying. No book is worth anything which is not worth much; nor is it serviceable, until it has been read, and re-read, and loved, and loved again; and marked, so that you can refer to the passages you want in it.

Your honesty is not to be based either on religion or policy. Both your religion and policy must be based on it. Your honesty must be based, as the sun is, in vacant heaven; poised, as the lights in the firmament, which have rule over the day and over the night.

What is poetry? The suggestion, by the imagination, of noble grounds for the noble emotions.

The truths of nature are one eternal change, one infinite variety. There is no bush on the face of the globe exactly like another bush; there are no two trees in the forest whose boughs bend into the same network, nor two leaves on the same tree which could not be told one from the other, nor two waves in the sea exactly alike.

A gentleman's first characteristic is that fineness of structure in the body which renders it capable of the most delicate sensation; and of structure in the mind which renders it capable of the most delicate sympathies; one may say simply "fineness of nature.

Drawing is a means of obtaining and communicating knowledge