Apart and a part

 I feel apart.

Apart as a brook babbling through an unknown land

Apart as a horse left to graze in a field.

Apart as a raindrop that plummets towards the ground.

Apart as a roll of thunder over a distant sea.

Apart as a myth that no one remembers.

I feel a part.

A part as a brook that joins with another and flows through a field on which a horse feeds.

A part as the brook water evaporates into raindrops that fall down.

A part as the drops gather into a storm from which thunder rolls.

A part as the water drops feed a tree in the forest that no one sees.

I feel apart and a part.