Insincerity is always weakness; sincerity even in error is strength.

It is unhappily true that much insincere Literature and Art, executed solely with a view to effect, does succeed by deceiving the public.

Metaphysical ghosts cannot be killed, because they cannot be touched; but they may be dispelled by dispelling the twilight in which shadows and solidities are easily confounded. The Vital Principle is an entity of this ghostly kind; and although the daylight has dissipated it, and positive Biology is no longer vexed with its visitations, it nevertheless reappears in another shape in the shadowy region of mystery which surrounds biological and all other questions.

A cell is regarded as the true biological atom.

All great authors are seers.

Remember that every drop of rain that falls bears into the bosom of the earth a quality of beautiful fertility.

Originality is independence, not rebellion; it is sincerity, not antagonism.