The ordinary man with extraordinary power is the chief danger for mankind -- not the fiend or the sadist.

Summary

This quote suggests that individuals who possess considerable power but lack an understanding of its consequences pose a greater threat to humanity than those who are inherently evil or sadistic. It highlights the danger of ordinary people obtaining extraordinary power without the necessary wisdom or moral compass to wield it responsibly. It implies that it is the misuse or ignorance of power by ordinary individuals that can lead to adverse outcomes and potential harm to society.