Religion plays a powerful role in the formation of scientific theories. By comparing the goals and practice of robotics and artificial intelligence in the US and Japan, differences between the two countries can be traced to their religious environments. Christian expectations of cosmic purpose and hope for salvation in purified, unearthly bodies leads to US researchers' preference for artificial intelligence over humanoid robots, a desire to see cosmic meaning in the development of that intelligence, and salvation of human minds in virtual, non-biological bodies. In Japan, robots, which have been the subjects of ritual consecrations and religious transcendence, participate in a fundamental sanctity of the natural world. A positive outlook on being human promotes a preference for humanoid robots and a future in which robots serve human beings, who do not forsake their bodies for virtual lives. Divergent scientific strategies cannot be separated from the religious worlds of their practitioners.