The Dao gives birth to unity

Aka the way gives birth to each one.

Unity gives birth to duality,

Aka one gives "miscarriage" to suggested dualism (reasoning)

Duality gives birth to trinity

Aka reasoning gives miscarriage to counting, hence accumulating things to reason about exponentially.

trinity

Father; mother; child doesn't represent three "together", but the perpetuation of oneself through another one (family "unit"), hence intercourse for off-spring. The inception of the child is being carried towards being born into apartheid, hence being set free (will of choice) from the bond with the mother. Raising the child implies letting go off dependency by growing independence...once again setting apart.