This article demonstrates that Milton’s orthodox presentation of the Crucifixion and the substitutionary atonement is predicated on his orthodox presentation of Jesus’s whole-life obedience, a perfect obedience to God and his law that substitutes for the disobedience of those who put their faith in Jesus. This presentation, evident in Paradise Lost , “Upon the Circumcision,” Paradise Regained , and De Doctrina Christiana , is consistent with presentations in various orthodox sixteenth- and seventeenth-century Reformed documents. Paradoxically, however, Milton’s presentational emphasis on the orthodox notion of Jesus’s whole-life obedience is likely predicated upon his heterodox views regarding the deity of the Son of God.