We live together, we act on, and react to, one another; but always and in all circumstances we are by ourselves. [...] by its very nature every embodied spirit is doomed to suffer and enjoy in solitude. Sensations, feelings, insights, fancies - all these are private and, except through symbols and at second hand, incommunicable.
In the course of evolution nature has gone to endless trouble to see that every individual is unlike every other individual....Physically and mentally, each one of us is unique. Any culture which, in the interests of efficiency or in the name of some political or religious dogma, seeks to standardize the human individual, commits an outrage against man's biological nature.
The man who has successfully solved the problem of his relations with the two worlds of data and symbols is a man who has no beliefs. With regard to the problems of practical life he entertains a series of working hypotheses, which serve his purposes, but are taken no more seriously than any other kind of tool or instrument. In other words, symbols should never be raised to the rank of dogmas, nor should any system be regarded as more than a provisional convenience.
Chronic remorse, as all the moralists are agreed, is a most undesirable sentiment. If you have behaved badly, repent, make what amends you can and address yourself to the task of behaving better next time. On no account brood over your wrongdoing. Rolling in the muck is not the best way of getting clean.