Knowing is not enough; we must apply. Willing is not enough;... - Johann Wolfgang von Goethe

"Ohne Hast, aber ohne Rast. - Without haste, but without rest."

"Be above it! Make the world serve your purpose, but do not serve it!"

"All truly wise thoughts have been thought already thousands of times; but to make them truly ours, we must think them over again honestly, until they take root in our personal experience."

"If I love you, what business is it of yours?"

"Let mental culture go on advancing, let the natural sciences progress in even greater extent and depth, and the human mind widen itself as much as it desires: beyond the elevation and moral culture of Christianity, as it shines forth in the Gospels, it will not go."