For example, a rock may be used (by rational agents) for good or bad purposes, but the rock itself is neither good nor bad. In ontological philosophy, the ancient gnostic concept that the material world was inherently evil applied morality to existence itself and was a point of concern in early Christianity in the form of Docetism, as it opposed the notion that creation is good, as stated in The Book of Genesis.[8] In modern science, however, the matter of the universe is often observed amorally for objective purposes.