A serious and good philosophical work could be written consisting entirely of jokes.

More from Ludwig Wittgenstein

• A good guide will take you through the more important streets more often than he takes you down side streets; a bad guide will do the opposite. In philosophy I’m a rather bad guide.
• I don’t know why we are here, but I’m pretty sure that it is not in order to enjoy ourselves.
• Make sure that your religion is a matter between you and God only.
• Tell them I’ve had a wonderful life.