This is a question skeptics love to ask, pointing out times in the New Testament where Jesus seemed not to have answers for certain questions or seemed to lack knowledge in certain areas. For example, some like to point out that He told his disciples in Mark 13:32 �But of that day and hour no man knows, not the angels in heaven nor the Son but only the Father� regarding his second coming. Or they like to point out that when the woman with an issue of blood touched his garment, he asked �Who touched me.� Or when dealing with the Garadene demoniac he asked �What is your name?� All of this is supposed to prove he was limited at best and probably fallible. But there is a huge gap in that leap of logic.
First of all the Bible declares emphatically that Jesus was not fallible. What has to be understood is that Jesus was a unique person with two natures, one human and one divine. As a man there were things of which he did not know, but as God he knew everything. There is no hint anywhere that his nature was fallible.
Jesus did not work his way up to being God or become God sometime during his public life. Philippians 1:5-11 tells us that he willingly laid aside the independent use of certain attributes that were rightfully his in order to follow his father�s direction in his ministry on earth.
Not only that but as Norman Geisler points out in his book �Christian Apologetics� �Even in his human state, Christ possessed supernormal if not supernatural knowledge of many things. He saw Nathaniel under the fig tree although he was not within normal visual distance (John 1:48). Jesus amazed the Samaritan woman with the knowledge he had about her private life (John 4:18-19). Jesus knew who would betray him in advance (John 6:64). He knew about Lazarus death before he was told (John 11:14), and of his crucifixion and resurrection before it occurred (Mk. 8:31; 9:31)� Whatever the limitation of his knowledge, it was vastly beyond normal men and completely adequate for his mission and doctrinal teaching.�
What we need to recognize is that the Bible makes it clear that Jesus is the authority on all matters with which he dealt. We will all be judged on what we do with his words (John 12:48). His word is a sure foundation (Matthew 7:24). His words are also eternal (Matthew 24:34).
We can in no way use the limitation Jesus displayed as our excuse for rejecting his teachings. Jesus demonstrated that he has authority to claim infallibility through his death, burial and resurrection. Although He was truly man he was also truly God and each of us must choose whether we will build our lives upon the rock (Jesus) or on the shifting sands of the world's philosophy.