What did Jesus talk about?

How did the idea of God arise? Perhaps it is someone's invention that humanity got infected with, or He truly exists and has been seen? Why have people always believed in Him? Some say that religion emerged gradually due to various factors. In particular, it is suggested that at the dawn of human history, primitive people, not understanding the causes of various, especially fearsome natural phenomena, came to the thought of the existence of invisible forces, gods, who reign over humans. However, this idea does not explain the fact of universal religiosity in the world. Even against the backdrop of rapid scientific development, the overwhelming majority of the Earth's inhabitants, including many scientists and philosophers, still believe in the existence of a Higher intelligence, God. Therefore, the cause of religiosity is not ignorance, but something else. There is much to ponder.