I often use the illustration of the fingers and the palm of the hand. Buddhism, Hinduism, Islam, Judaism, and Christianity are all separate in one sense. But as you move toward the source in any tradition, the interrelatedness begins to grow. As one might say, we meet in the cave of the heart. When we arrive in the center, we realize the underlying unity behind the traditions. But I'm suspicious of attempts to mix them on the outer level.
— Bede Griffiths, The Other Half of My Soul by Beatrice Bruteau, editor