Each balances other. Each compliments the other.
There is no 'I' without 'You'.
Within the confines of 'You' and 'I' the Universe and Life finds its varied existence.
Without resides Realisation.
Male Female, Birth Death, Satvva Tamas, Spring Winter, Day Night, Pain Pleasure, Body Spirit, Anguish Ecstasy, Questions Answers and all its varied opposites supplement each other in this play of creation.