It is interesting to me where some who think they are ‘holier’ than other Christians simply because they don’t “fall into” the trappings of Christmas, are the same people who continue to eat horribly and not exercise. After all our bodies are the temple of God so why not take care of it? Legalism is nothing but self-centeredness (spiritual arrogance) not Godliness.
Good point about legalism, it does rob us of joy, life and love for others. And it blinds us to our own hidden sins that you mentioned.