Probably most of us were told sometime in the past that the world is based on opposite elements. There is white and there is black; there is right and there is wrong, etc. The problem is that we believe that it is truth. But fortunately it is not.
Something is or something isn't, but there is no opposite. To better understand it we have to see that a lack of something is not a different existence. You have light, but there is no darkness, it is just a lack of light and at the moment you put light in, the darkness is gone. You cannot put darkness into light because it does not exist on its own. Something is heavy, but if you take a part of the heaviness it will become light. If you add something light to heavy it will not make the heavy stuff light. So if something is good, you can remove goodness from it and it becomes an evil, but adding evil to something good is impossible because goodness is a fulfillment of itself. There is no place for evil in it.
So here is the most important part. There is God and there is no god. If you place God in a godless place, it will turn into something good. You cannot put a godless thing on God. The only thing you can do is to remove God. And this is a problem. Where there is a lack of God, there is darkness, because the light was removed. Israel was waiting for the Light of the World, because this was the only way to be with God again. Our Advent is the same. We are waiting for the second coming of our Lord, Jesus Christ, because only with Him can we stay in the true light. The darkness of sin is a lack of God's presence. We have to bring God back to our life, job, family gatherings. This will fill the lack of some basic needs we have.
Do not believe that there are options. There is something and there is lack of it. No options. Lack of something means lack of perfection, lack of fullness, lack of happiness. So use this Advent to bring into your life what you are lacking the most and which comes from God.