My Puzzle Has Two Pieces

Each piece is many sided the colors weave and blend I've tried to put them every way they don't fit end to end The right won't fit the left side the left won't fit the right I worked on it for many hours and late into the night I tried to put them upside down then backwards, in-between Tried to turn them inside out do you know what I mean? Perplexing as it seemed to be I gave it one last try I failed again, my head hung low a tear drop in my eye Then all at once it dawned on me they will always be apart The good and bad can never blend for I know this in my heart It will not help a soft voice said they'll tolerate at best I worked on this ten thousand years That was the final test.....