Christian theologians have considered the significance of life elsewhere in the cosmos since the fifteenth century, but the brevity of these discussions calls for greater theological precision: the notion of multiple incarnations, for example, is often explored without reference to the detail of Christological formulations. Attention to the logical mode in which such work is set out is also fruitful, where the scholastic category of suitability or fittingness holds particular promise. As suitable, God’s actions are free and yet congruent, being consistent with the divine nature, with creaturely natures, and with the ends of God’s dealings with creatures.