The reasonable man adapts himself to the world; the unreasonable one persists to adapt the world to himself. Therefore all progress depends on the unreasonable man.
The Master said, A gentleman, in his plans, thinks of the Way; he does not think how he is going to make a living. Even farming sometimes entails 5 times of shortage; and even learning may incidentally lead to high pay. But a gentleman's anxieties concern the progress of the Way; he has no anxiety concerning poverty.
The fact is there is nothing that you can trust; and that is a terrible fact, whether you like it or not. Psychologically there is nothing in the world, that you can put your faith, your trust, or your belief in. Neither your gods, nor your science can save you, can bring you psychological certainty; and you have to accept that you can trust in absolutely nothing.
If you are lucky enough to have lived in Paris as a young man, then wherever you go for the rest of your life it stays with you, for Paris is a moveable feast.