Union with Christ is crucial to Paul’s articulation of the gospel, as evidenced by his own writings and the observations of countless interpreters. Richard Gaffin, following John Calvin, boldly yet accurately asserts that “Union is the all-or-nothing reality on which everything depends in the application of salvation.” Constantine Campbell describes union with Christ as the web that holds Paul’s entire theological framework together. As theologically rich as Paul’s writings on union with Christ are, they are equally, if not more, practical. The exegetical prominence, theological significance, and practical import of union with Christ, however, are generally overlooked in the teaching and life of the church. Often, union with Christ is understood as an abstract concept whose everyday relevance is difficult to ascertain. In order to mitigate this gap, this paper highlights a general pattern in Paul’s understanding of union with Christ by exegeting three of the most pivotal passages: Galatians 2.20; Romans 6.1-11; and Colossians 2.10-13. These passages evince a logical flow that is remarkably consistent: (a) Paul introduces union with Christ in the context of correcting misunderstandings that are plaguing the hearers of his epistles; (b) he explains the practical purpose of union with Christ; and (c) he anticipates common misapplications of union with Christ. By tracing this argumentative movement in these passages, the paper not only explains the doctrine of union with Christ according to Paul’s logic, but in such a way that can saturate the life of the church.