The theme of “presence” holds an ambivalent place in Gerald O'Collins’ Christology. On the one hand the theme is O'Collins’ “most creative contribution to contemporary Christology” and on the other hand the notion itself is a difficult and stubborn concept that can be best understood in an evolutionary way. This deeper analysis of “presence,” which is not offered by O'Collins, occupies a center stage in Bernard Lonergan's Christology. This essay mediates O'Collins’ account of “presence” with Lonergan's evolutionary understanding of the term—a scientific theological account Lonergan worked out in dialogue with phenomenology and the sciences. The paper argues that such a mediation is necessitated by the fact that the meaning of “presence” is key to understanding the Chalcedonian definition of the union of the two natures of Christ, an important Christian dogmatic teaching that both O'Collins and Lonergan consider sacrosanct, and that a clarification of this meaning advances not only Christian understanding of Christ's presence in history, but also Christ's presence in non‐Christian religions.