Palindrome of the Doppleganger

In studying about Palindrome implementation by Java, a rather suspenseful poem was found at Hunting the Muse. The Doppleganger by James A. Lindon can be read line by line either from the top of from the last line. The meaning is still maintained either ways.

Doppelganger

Entering the lonely house with my wife
I saw him for the first time
Peering furtively from behind a bush --
Blackness that moved,
A shape amid the shadows,
A momentary glimpse of gleaming eyes
Revealed in the ragged moon.
A closer look (he seemed to turn) might have
Put him to flight forever --
I dared not
(For reasons that I failed to understand),
Though I knew I should act at once.

I puzzled over it, hiding alone,
Watching the woman as she neared the gate.
He came, and I saw him crouching
Night after night.
Night after night
He came, and I saw him crouching,
Watching the woman as she neared the gate.

I puzzled over it, hiding alone --
Though I knew I should act at once,
For reasons that I failed to understand
I dared not
Put him to flight forever.

A closer look (he seemed to turn) might have
Revealed in the ragged moon.
A momentary glimpse of gleaming eyes
A shape amid the shadows,
Blackness that moved.

Peering furtively from behind a bush,
I saw him for the first time,
Entering the lonely house with my wife.