It seems this Austrian Jewish philosopher (contemporary of Adolph Hitler) didn’t enjoy himself all that much but he did a lot of heavy thinking. Enough so that he made his mark on the philosophical world, reaching the equal to such greats as Bertrand Russell (his university mentor). One of his contributions was perhaps in his ability to simplify complexities as described in Wikipedia :

“Language has evolved as a way to cope with everyday problems, and it functions well within the context in which it has arisen, but when everyday language is made to accommodate something beyond the domain of the everyday, we can expect problems to arise.

To take a simple example, if someone on the street asks ‘What time is it?’ there is usually a straightforward answer, but if a person were to ask ‘What is time?’ the situation would be quite different. The bottom line in this case is that, while ‘What is time?’ might be a valid question in the context of traditional metaphysics, it is effectively a question to which there is no answer — since language is seen as determinative of the possibilities of thought.

Wittgenstein would say, it is not, properly speaking, a question at all (at the very least, it is not a question which philosophers ought to be trying to answer).”