The notion of a law of nature did not arise out of the practice of science itself. Sometime in the seventeenth century, it was imported into discourse about science from Christian theology, both directly, and indirectly through mathematics. Originally, laws of nature were understood as God's laws for nature. Thus, behind the laws of nature was a lawgiver, from whence came the universality and necessity of such laws. It is still common for scientists and commentators on science to speak of nature as being 'governed' by laws of nature, which suggests that somewhere there might be a 'governor.'