According to plural person theory, a group of close friends can act together not just distributively, as separate individuals all at once, but also corporately, as a nonmetaphorical plural person supervening on the friends. This article proposes that the Spirit is a plural person in precisely this sense. Modeling the Spirit as a plural person not only secures the Spirit's personhood and full divinity; it also provides a new conceptual scheme for interpreting the relationship between divine grace and human agency along non-competitive lines. What is more, it makes sense of existing Christian practices, including Ignatian contemplation, evangelical quiet time, and Quaker waiting worship.