Answer: Wittgenstein belonged to one of the richest Austrian families. Because of philosophical (?) reasons he gave up his fortune and thinking that too much of wealth would do no good to the poor, he distributed his fortune among his family members and became mathematic teacher in a lost village in the Austrian mountains. There he developped his famous ‘tractatus mathematicus’ dealing with symbolic logic. When it was ready he sent it to Russell in Oxford, who shew some interest for his writings. Asked to rejoin him in England he answered, he hadn’t a penny. Russell thus sent the money for the journey (by train). Now. (This is what is known.) Neither the one nor the other ever got married. Did Wittgenstein pay in ‘nature’ (flesh) the favour made by Russell? Conclude: what you don’t know you better dont talk about (last sentence of the tractatus).