“No human being is sole master of his fate when he has united it with another’s.”
Key emphasizes interdependence in intimate partnership: once lives are joined, each person’s choices and development partly affect the other’s future.
Source details
Love and Marriage, represented by Project Gutenberg #57592, English edition copyright 1911, translated from Swedish by Arthur G. Chater. The sentence appears in Key’s historical discussion of fidelity, personality and reciprocal development in love; it is early-twentieth-century social philosophy, not relationship therapy.