People who don’t know God worship idols. There is no middle ground of non-worship, where I give my allegiance to nobody and nothing. As human beings we are made to worship, and we will worship substitutes if not the true God.
Idols can be many: in the Western world, not usually literal idols, but more often jobs, homes, money, cars, family, relationships, study, good health, beauty, fame, etc: the “good life”. We devote our time, money, energy and attention to procuring and maintaining these things, while God falls by the wayside and receives little or no attention. These “idols” are what we look to for life, security, and happiness, and we truly believe our existence is tied up in them. We manipulate them, others, and circumstances endlessly to ensure they will provide us what we seek.