There are, indeed, things that cannot be put into words. They make themselves manifest. They are what is mystical. (6.522) - Ludwig Wittgenstein

Philosophy is not a theory but an activity

Don't say: “They must have something in common, or they would not be called ‘games’" but look and see whether there is anything common to all. For if you look at them, you won't see something that is common to all, but similarities, affinities, and a whole series of them at that. To repeat: don't think, but look!

Philosophy hasn't made any progress?—If someone scratches where it itches, do we have to see progress? Is it not genuine scratching otherwise, or genuine itching?