It is easier to contend with evil at the first than at the last.

But to me all sciences seem vain and full of error that are not born of experience, mother of all certainty, and do not terminate in an actual experience.

The eye, the window of the soul, is the chief means whereby the understanding can most fully and abundantly appreciate the infinite works of Nature; and the ear is second.

The water which rises in the mountains is the blood which keeps the mountain in life.

The cat is nature's masterpiece.

The sun gives spirit and life to the plants and the earth nourishes them with moisture.

Human subtlety will never devise an invention more beautiful, more simple or more direct than does nature because in her inventions nothing is lacking, and nothing is superfluous.