The principal objective of this article is to develop an overtly theological interpretive lens for assessing the ethics of human germ line genetic modification (GGM). In constructing this lens, I draw upon four selected doctrinal or thematic strands: Incarnation, resurrection, procreative mandate, and sin. In turn, I derive four corresponding moral claims: there is no Christian essentialist understanding of the body, the body cannot be perfected, offspring remain a good of marriage, and sin is a universal human disability. In conclusion, (...) I contend that for Christians there are three possible broad options for assessing the ethics of GGM: refusal, endorsement, and ambivalence. In each, I assess the principal strengths, weaknesses, and limitations of the respective theological themes, moral claims, and options. In addition, for the sake of this inquiry I assume that the technologies at issue are safe, efficacious, and do not entail the destruction of embryos or fetuses. (shrink)