Russell
"The Law of Love is rhythmic balanced interchange between all things. Upon the law of balanced interchange, this entire reciprocal universe is motivated with such exactness of balance that astronomers can calculate the positions of planets and suns to the split second. In this wise, the universe is dependable. It observes the Law. It cannot do otherwise where God controls all things." [Russell, The Universal One, Preface]

See Also

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Law of Assimilation
polar and depolar interchange
rhythmic balanced interchange
Seesaw