You always hear people say that philosophy makes no progress and that the same philosophical problems which were already preoccupying the Greeks are … - Ludwig Wittgenstein

6.4 All propositions are of equal value.
6.41 The sense of the world must lie outside the world. In the world everything is as it is, and everything happens as it does happen: in it no value exists — and if it did exist, it would have no value. If there is any value that does have value, it must lie outside the whole sphere of what happens and is the case. For all that happens and is the case is accidental. What makes it non-accidental cannot lie within the world, since if it did it would itself be accidental. It must lie outside the world.
6.42 So too it is impossible for there to be propositions of ethics. Propositions can express nothing that is higher.
6.43 If the good or bad exercise of the will does alter the world, it can alter only the limits of the world, not the facts — not what can be expressed by means of language. In short the effect must be that it becomes an altogether different world. It must, so to speak, wax and wane as a whole. The world of the happy man is a different one from that of the unhappy man.
6.44 It is not how things are in the world that is mystical, but that it exists.
6.45 To view the world sub specie aeterni is to view it as a whole — a limited whole. Feeling the world as a limited whole — it is this that is mystical.

We feel that even if all possible scientific questions be answered, the problems of life have still not been touched at all.

Every explanation is after all an hypothesis.