To accomplish great things, we must not only act, but also dream; not only plan, but also believe.
There are no bad books any more than there are ugly women.
Irony is the gaiety of reflection and the joy of wisdom.
Existence would be intolerable if we were never to dream.
The duty of literature is to note what counts, and to light up what is suited to the light. If it ceases to choose and to love, it becomes like a woman who gives herself without preference.
The man of science multiples the points of contact between man and nature.