"God acts on sublunary beings using the sky as a tool": hence the natural and rational explanation of the allegedly supernatural phenomena, since even astrology was considered a science. God may use such phenomena to warn the people, and especially rulers, of danger. But the real origin of supernatural phenomena is, for Vanini, the human imagination, which can sometimes change the appearance of external reality. For the ecclesiastical "impostors" that promulgate false beliefs to gain wealth and power, and rulers interested in dominating the people, according to Vanini, "all religious things are false and fake principles to teach the naive populace that, when reason cannot be reached, at least practice religion".