Word order in writing

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try to write! When I write, it usually a simple flow of words my mind has chosen. I am not a trained writer thus Bill Gates' "Green Lines" and my thoughts often differ. Last week I was writing the greeting for the inside of my xmas cards. The phrase I chose was "May the coming year be one of happiness and joy" Now (the question), In that phrase I chose the multi-syllable word to preceed the single syllable word: Happiness and Joy. Later I was thinking about it and thought that if I had started the phrase with those words I would have reversed their order' "May Joy and Happiness... ". Is there a common rule that addresses the issue of word order or is this some issue of writing it as it feels correct?