The secular world is more spiritual than it thinks, just as the ecclesiastical world is more materialist than it cares to acknowledge.
When you do a good turn you feel rich, even if you are broke.
I was not comfortable worshipping another Jew.
For a devotee or lover, the being, worshipped or loved, will always be the only one for her or him.
Old friends die on you, and they're irreplaceable. You become dependent.
For a Christian, Jesus is the unique and only way that God has fully revealed himself. For a Jew this cannot be.