The author seeks to respond to the philosophical appeal of W. Norris Clarke, S.J., “to uncover the personalist dimension lying implicit within the fuller understanding of the very meaning and structure of the metaphysics of being itself, not hitherto explicit in either the metaphysical or personalist traditions themselves.” She does this by discussing the distinctions drawn by Karol Wojtyla: (1) between a human being’s personhood and his humanity, and (2) between the ontological dignity and the ethical dignity of the human (...) person. (shrink)

From fertilization to approximately the sixteenth day of development, human embryonic cells are said to have the capacities of totipotency and monozygotic twinning, both of which are problematic to a theory of ensoulment at fertilization. In this article I will address the problems which these capacities pose to such a theory and present an interpretation of the biological data which renders ensoulment at fertilization more plausible. I will then argue that not only is an ensoulment theory consistent with current biological (...) data on the human embryo, but it may offer an explanation for the phenomencon of monozygotic twinning. (shrink)