You’ve probably heard it said that it takes twice as many muscles to frown than it does to smile. That may or may not be true, but one of the muscles used for smiling is called the levator labii superioris. On the other hand, the muscles used to frown include the depressor labii inferioris. Personally, I find it amusing that you use the depressor muscle to frown and that it is an inferior(is) muscle, but that’s just me.
Joy is one of the nine-fold attributes of the ‘fruit of the Spirit’ (Galatians 5:22-23), and smiling is the natural result of joy. If you can not think of any other reason to smile today, let me give you a very big one. You can say, as did the prophet Isaiah:
I will greatly rejoice in the LORD, my soul shall be joyful in my God; for he hath clothed me with the garments of salvation, he hath covered me with the robe of righteousness, as a bridegroom decketh himself with ornaments, and as a bride adorneth herself with her jewels. (61:10):
A smile costs nothing but gives much. It enriches those who receive without making poorer those who give. It takes but a moment, but the memory of it sometimes lasts forever. None is so rich or mighty that he cannot get along without it and none is so poor that he cannot be made rich by it. Yet a smile cannot be bought, begged, borrowed, or stolen, for it is something that is of no value to anyone until it is given away. Some people are too tired to give you a smile. Give them one of yours, as none needs a smile so much as he who has no more to give. ~Author Unknown