The gem cannot be polished without friction, nor man perfected without trials.
This reminds me of the post from my bff (blog friend forever) Sue here. She IS a writer. She has a way with words and ideas and music and poetry that jog your mind into action. Here she relates this same proverb to the ocean and polishing the rocks. Adversity, got ta love it, or not, but it is here to stay so might as well find meaning in it. I'm trying.