Love is the most practical thing in the world. To love, to be kind, not to be greedy, not to be ambitious, not to be influenced by people but to think for yourself-these are all very practical things, and they will bring about a practical, happy society.
Just as the law of gravitation existed before its discovery and would exist if all humanity forgets it, so it is with the laws that govern the spiritual world. The moral, ethical and spiritual relations between soul and soul and between individual spirits and the Father of all spirits were there before their discovery and would remain even if we forget them.
The only difference between man and man all the world over is one of degree, and not of kind, even as there is between trees of the same species. Where in is the cause for anger, envy or discrimination?
The Buddha taught some people the teachings of duality that help them avoid sin and acquire spiritual merit. To others he taught non-duality, that some find profoundly frightening.
To be alive spiritually man must have union with God and must be conscious of it. Apart from this union his religious life will be an empty drudgery, a mere imitation of true spirituality.