If a man writes a book, let him set down only what he knows. I have guesses enough of my own. Johann Wolfgang von Goethe
Knowing is not enough; we must apply. Willing is not enough; we must do. See image Johann Wolfgang von Goethe
The really unhappy person is the one who leaves undone what they can do, and starts doing what they don't understand; no wonder they come to grief. See image Johann Wolfgang von Goethe