Christ's human nature died; his divine nature explains the resurrection

His human nature is what died on the cross. His divine nature is what made it impossible for death to hold him (Acts 2:24 implied). Scripture says it was impossible for death to keep him — his deity necessitated his resurrection. 'His humanity explains his death; his deity explains his resurrection.' This framework makes the Incarnation necessary: God cannot be crucified in a purely spiritual manifestation; he had to take on genuine human form.