Believing with you that religion is a matter which lies solely between man and his God, that he owes account to none other for his faith or his worship, that the legislative powers of government reach actions only, and not opinions, I contemplate with sovereign reverence that act of the whole American people which declared that their legislature should make no law respecting an establishment of religion, or prohibiting the free exercise thereof, thus building a wall of separation between Church and State.  Of course my moods change, but the average is serenity. I have a firm faith in art, a firm confidence in its being a powerful stream which carries a man to a harbor, though he himself must do his bit too; at all events, I think it such a great blessing when a man has found his work that I cannot count myself among the unfortunate. I mean, I may be in certain relatively great difficulties, and there may be gloomy days in my life, but I shouldn't like to be counted among the unfortunate, nor would it be correct if I were.  
If you have a particular faith or religion, that is good. But you can survive without it.
