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

You won't — I really believe — get too much out of reading it. Because you won't understand it; the content will seem strange to you. In reality, it isn't strange to you, for the point is ethical. I once wanted to give a few words in the foreword which now actually are not in it, which, however, I'll write to you now because they might be a key for you: I wanted to write that my work consists of two parts: of the one which is here, and of everything which I have not written. And precisely this second part is the important one.

the conditions for sense rather than nonsense in combinations of symbols;

Die Welt des Glücklichen ist eine andere als die des Unglücklichen