In 1 Chronicles 16, David sings a song of thanks to the Lord. In verses 25-26, David sings:
For great is the LORD, and greatly to be praised, and he is to be held in awe above all gods. For all the gods of the peoples are idols, but the Lord made the heavens.
What separates the LORD from all the other gods in the world? He creates. They are created. That’s the difference between God and an idol, between the finite and the infinite.
And don’t just think of golden statues when you read “gods.” Think power, money, sex, food, entertainment, sports, friends, success, looks, fashion, and any other good thing in this world. They are all created things, and so they cannot comfort or provide in our darkest hour. But God is not created. He creates, and therefore is everlasting and infinite. So in your time of deepest despair, he is able to provide grace and mercy to help.