The Dichotomy of Self

I am the embodiment of extremes. Well, I guess there's nothing wrong with it.

Two minds, two stances, two halves of an identity;
Never compromising, only winning or losing;
One way or another, it has got to be.

Good or Evil? The angel and devil plays
Hide-and-Seek, Police-and-Thief;
Within one entity, a dichotomy.

Not unlike the push and pull of gravity;
The true and false of assumptions;
The null and alternate hypotheses.

Not unlike the left and right of crossroads;
The maddening to and fro of traffic;
The rising and falling of tides in the sea.

As sure as each breath taken in and out deeply;
The heart muscles expand and contract, rhythmic;
Such is it, the Yin and Yang of nature's harmony.