I was just reading in Genesis about how God created light the first day of creation. The hebrew word is owr, it is a word associated with life, joy, good. God divided it from the darkness, or what is bad. God created the sun and moon on the fourth day, so this light is different from sunlight.
I can choose to live with the light. I am blessed, of course, because I am elderly and live alone and able to take care of myself. There are people who live around me who steal, a crime was committed near my house, I am sure that there are people near me who live in darkness. But the people who come to visit my house are also in the light. God's light is my world.
I have a prayer shawl, one that has all the "God" bells and whistles. It is made of lambs wool, it is white and blue the colors representing purity, it is made by loving hands. I know, it is of the world. It has no power at all, but it reminds me of the real power of God. I put it over my head and feel God around me. I let scripture and God thoughts fill my mind.
We can choose to put on the whole armor of God, we can choose to keep our minds, hearts, and sorls with the light of God.