For there is but one mistake; the whole idea that loss is possible, and could result in gain for anyone. If this were true, then God would be unfair; sin would be possible, attack be justified and vengeance fair.

A Course in Miracles (Foundation for Inner Peace), T-26.II.2:5-6

You take a side and join the throng,
and winning carries you along.
Your side opposes other men
and always seeks to score a win,
so you can sing the victory song.

Yes, now you feel that you belong.
You seek your triumphs to prolong.
Though you may bleed and lose some skin,
you take a side.

Yet unity alone is strong.
The fighting went on much too long.
When you defeat your foe again,
you feel a sadness deep within.
You walk away—it now feels wrong
to take a side.