A little-o-this and a little-o-that for contentment?

It is completely true when someone finds one flaw in themselves then they aren't beautiful but everyone else is and we ignore there flaws. Or when someone is conceided the reverse. If one thing goes wrong were failing but if one thing goes right we dont consider ourselves a full success. But if we can live life some where in the middle not thinking that everything is this or that then were winning in life. That poem is so inspiring i dont kno how ive lived life without reading it. Thank you