Logic precedes every experience — that something is so. - Ludwig Wittgenstein

We feel as if we had to penetrate phenomena: our investigation, however, is directed not towards phenomena, but, as one might say, towards the 'possibilities' of phenomena.

Giving grounds, however, justifying the evidence, comes to an end; but the end is not certain propositions striking us immediately as true i.e. It is not a kind of seeing on our part; it is our acting which lies at the bottom of the language game.

The aspects of things that are most important for us are hidden because of their simplicity and familiarity. (One is unable to notice something — because it is always before one's eyes.) The real foundations of his enquiry do not strike a man at all. Unless that fact has at some time struck him. — And this means: we fail to be struck by what, once seen, is most striking and most powerful.