That is a very important question.  We know that the Lord Jesus did not sin, but COULD HE HAVE SINNED?  I believe I can say that our entire eternity depends on the answer to this question.  First, let’s look at how Satan tempted the Lord.  We read in Matthew 4:1-11, “Then was Jesus led up of the Spirit into the wilderness to be tempted of the devil. And when he had fasted forty days and forty nights, he was afterward an hungred. And when the tempter came to him, he said, If thou be the Son of God, command that these stones be made bread. But he answered and said, It is written, Man shall not live by bread alone, but by every word that proceedeth out of the mouth of God. Then the devil taketh him up into the holy city, and setteth him on a pinnacle of the temple, And saith unto him, If thou be the Son of God, cast thyself down: for it is written, He shall give his angels charge concerning thee: and in their hands they shall bear thee up, lest at any time thou dash thy foot against a stone. Jesus said unto him, It is written again, Thou shalt not tempt the Lord thy God. Again, the devil taketh him up into an exceeding high mountain, and sheweth him all the kingdoms of the world, and the glory of them; And saith unto him, All these things will I give thee, if thou wilt fall down and worship me. Then saith Jesus unto him, Get thee hence, Satan: for it is written, Thou shalt worship the Lord thy God, and him only shalt thou serve. Then the devil leaveth him, and, behold, angels came and ministered unto him.”

It is interesting to note that in all three of these grievous temptations from Satan, the answer from the Lord Jesus was consistently, “IT IS WRITTEN.”  The Lord Jesus rebutted each temptation by quoting from the scriptures.  We have that same ability!  When temptation comes, we can use God’s Word to guide and strengthen us so that we do not give in to temptation. Satan himself said, when tempting the Lord, “IT IS WRITTEN.”  He then quoted Psalm 91:11-2.  Imagine, Satan himself with a Bible under his arm and a portion of God’s Word in his mouth!”  May we be so careful to realize the ways of the enemy and know that any time he uses the Word, He is seeking to confuse or mislead us. 

Could Christ have sinned?  I will emphatically say, NO, He could not sin.  It has been said before that this temptation was not to see if Christ could sin, it was to prove that Christ could not sin!  The Lord Jesus later says in John 14:30, “Hereafter I will not talk much with you: for the prince of this world cometh, and HATH NOTHING IN ME.”  The ‘prince of this world’ is Satan (Ephesians 2:2).  There was absolutely nothing in Christ that Satan could appeal to.  There is no sin nature, no desire apart from the Father’s desire.  Christ is SINLESS in nature and practice!  We often say that Christ is impeccable, which means He is incapable of sinning.  If He was capable of sin, He would not be perfect and would Himself need a savior.  When the Lord Jesus took on flesh and blood (John 1:1, 14), He had the appearance of any other man as we read in Romans 8:3, “For what the law could not do, in that it was weak through the flesh, God sending his own Son in THE LIKENESS OF SINFUL FLESH, and for sin, condemned sin in the flesh.” Yet, we are told that the Lord Jesus ‘did no sin’ (1 Peter 2:22), ‘in Him is no sin’ (1 John 3:5), and He ‘knew no sin’ (2 Corinthians 5:21). 

We read in James 1:13, “Let no man say when he is tempted, I am tempted of God: for GOD CANNOT BE TEMPTED WITH EVIL, neither tempteth he any man.”  The Lord Jesus is God, and as such, HE CANNOT SIN. 

Hebrews 13:8 says, “Jesus Christ the same yesterday, and to day, and for ever.”  That shows that if Christ could have sinned, He would still be able to sin today because He retains the same fundamental nature He did while living on earth.  We can see from God’s Word that the Lord Jesus not only did not sin, He was incapable of sinning.  (CC)  (525.6)