Simply because Christ is impeccable—unable to sin—does not mean that his sinless perfection is any less glorious or any less incredible! Christ succeeded at every point where we have failed. He was tempted in every way we are, yet without sin (Hebrews 4:15).
Last week at the Seminary, we had the privilege of a guest preacher in chapel. During his sermon he shared a powerful illustration about his love for his bride—that speaking accurately about her is not the same as love for her, but since he loves her, he will always seek to speak accurately about her. He applied this, of course, to our love and commitment to the Lord Jesus. Having accurate theology about Christ is not the same as love for Christ, but if we love him we will always seek to speak rightly about him.
It was a beautiful illustration, an accurate illustration, and a helpful illustration. Assuredly we are not saved by correct theology—but we who are saved should relentlessly pursue correctly thinking about and speaking about the One we love.
There is one area, however, about our precious Lord Jesus that seems to be falling out of vogue when it comes to speaking rightly about him. That area of theology is what theologians refer to as the “impeccability of Christ”. Now before you click away and go read a more “entertaining” blog post, please allow me to explain, because as the illustration above points out, this is worth it! We must want to know our Lord in a way that accords with his truth. The impeccability of Jesus means that Christ was unable to sin. Now, all who affirm the Bible would agree that Christ did not sin, but far fewer these days are willing to take the next step beyond his sinlessness and speak of the fact that Christ could not sin; or in other words, his impeccability.
The impeccability of Christ means that Jesus could not sin.
The fact that Christ could not sin, flows from the simple truth that Christ cannot change. In Hebrews 13:8, the author says “Jesus Christ is the same yesterday, today, and forever.” This short but incredibly profound sentence means that it would be impossible for our Savior to change. Elsewhere in Hebrews, the same author says of our Lord, that the heavens and earth change, but Jesus never does: “Like a garment they will also be changed. But You are the same” (Hebrews 1:12). Christ does not change, and cannot change. If it were possible for Jesus to change, then the book of Hebrews would also have to change, for it would no longer be true!