The Mumbling Man

I went to the store and saw a man talking to himself. The conversation inspired me.

Mumbling man,
Back and forth,
Pacing across the floor,
Speaking to no one,
Speaking to someone,
A face invisible to me.

Mumbling man,
Here and there,
Traversing a crowded plain,
Never once silent,
Never once loud,
Conversation inaudible to me.

Mumbling man,
To and fro,
Traveling through space and time,
Posing tough questions,
Posing tough answers,
A puzzle intangible to me.

Mumbling man,
Left and right,
Moving but never free,
Always fighting,
Always fleeing,
An enemy inconceivable to me.