Admittedly, God adapted to human limitations in order to communicate with us. Indeed, Jesus, who was God, was also 'a human being, and as a human being He was limited in His knowledge. This is borne out by several passages of Scripture; for instance, as a child "he grew in wisdom" (Luke 2:52). Even as an adult He had certain limitations on His knowledge. According to Matthew, Jesus did not know what was on the fig tree before He got to it (Matt. 21:19). Jesus Himself said He did not know the time of His second coming: "No one knows about that day or hour, not even the angels in heaven, nor the Son, but only the Father" (Matt. 24:36).
However, despite the limitations on Jesus' human knowledge, we know that He never erred for two basic reasons. First, limits on understanding are different from misunderstanding. The fact that He did not know some things does not mean He was wrong in what He did know. It is one thing to say Jesus did not know as a man a theological position of some pagan religion held on the other side of the globe or what was on every fruit tree in Israel, for example. But it is quite another to say Jesus was wrong when He affirmed that David wrote Psalm 110 (Matt. 22:43) or that Moses wrote the law (Luke 24:27; John 7:19, 23) or that Daniel wrote the prophecy attributed to him in Matthew 24:15. In short, Jesus' limitations on things He did not know as a man did not hinder Him from affirming truly the things He did know. And God did reveal things to Him, as necessary, such as when He saw Nathaniel under the fig tree in a vision too far away to have known such a thing by physical senses.
Second, what Jesus did know and teach He affirmed with divine authority. This is evident for many reasons. For one thing, Jesus said to His disciples: "All authority in heaven and on earth has been given to me. Therefore go and make disciples of all nations, baptizing them in the name of the Father and of the Son and of the Holy Spirit, and teaching them to obey everything I have commanded you. And surely I am with you always, to the very end of the age" (Matt. 28:18-20).
Further, He affirmed many things He taught with emphasis. In the gospel of John, Jesus said twenty-five times "Truly, truly..." (John 3:3,5,11). Indeed, He claimed His words were on the level of God's, declaring, "Heaven and earth will pass away, but my words will never pass away" (Matt. 24:35).
What is more, Jesus taught only what the Father told Him to teach: "I do nothing on my own but speak just what the Father has taught me' (John 8:28). He added, "By myself I can do nothing; I judge only as I hear, and my judgment is just, for I seek not to please myself but him who sent me" (John 5:30). So to charge Jesus with error is to charge God the Father with error, since He spoke only what the Father told Him to speak.
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