‘They glorified him not as God.’ You knew he existed; you knew he was there, and yet you didn't give him his glory and honour him, and worship him.
What has happened to the human race? Because of ingratitude to God and repudiation of him as he is? We cannot go beyond horizontal thinking, as it is called. We can no longer think upwards. We can no longer see the things of God, nor do we want to, nor do we seek after them. Everything must be explained in human terms, in horizontal terms. I am only interested in the here and now. I am only interested in what happens to me now, what I can have, what I can enjoy, and so on.
You give the child a gift. You treat the child perhaps in an especially favourable way for some reason or other. You are particularly kind, and the child takes no interest in you, throws it back at you, as it were; takes what you give and runs off, and insults you, and despises you. Well, you say, what a terrible thing. But that is the human race. That is every human being. When it is obvious to us through and through that we have a mighty Creator God, we refuse to acknowledge him. We turn away from him. We refuse to give him honour.