I can understand why you might say that. But I'm not so sure you are correct. "A power struggle between everything"?
It seems to me that power struggles typically refer to people in a relationship fighting about who is in control, with both trying to dominate the relationship in one way or another.
to struggle is to contend vigorously with an adversary or adverse conditions.
http://www.thefreedictionary.com/struggle
There is a grain of sand on mars. Am I to assume that it and I are engaged in some kind of power struggle? I don't think so.
The chair I am sitting on, is it contending and plotting against me? Is it my adversary? I don't think so.
So no, we cannot say that life is a power struggle between "everything". But sure power struggles exist.
I was just watching a couple birds around the bird feeder, where one bird was chasing the other away from the food, so that he could get to and have the food. I suppose I was witnessing a power struggle.
But in that sense, life can be a lot of things.
Life is a lesson.
Life is a lesson in humility.
Life is a song - sing it.
Life is a game - play it.
Life is a challenge - meet it.
Life is a dream - realize it.
Life is a sacrifice - offer it.
Life is love - enjoy it.
Life is a comedy for the rich
Life is a tragedy for the poor.
Read more at:
http://www.brainyquote.com/quotes/topics/topic_life.html
And yes, life is a struggle.