X is the unknown, the independent variable: also the mark of treasure, of affection, of the illiterate.
Here is a formula to consider:
My life + X = perfect
Dog and me, we wander the woods, hear only the wind, the river, a whir of duck wing. Thirsty eyes drink up the green, and cheer. There's a bough over deep water that I've seen, and dare to climb. Here, even my slight shiver of fright is refreshing. Giggle and get down, gently, as the bank is not sturdy. Walk then, over anemones, primrose, wild garlic, baby stalks of bramble and rose, down where the fallen tree has gathered a shale beach, and off come my boots and the water is not so cold and the rocks mud-slippy. If I had thought of it, I would have drawn an X in this shored up silt, where the sun was shining through the edge of the new leafed trees.