To illustrate the state of mind of the Jerusalem Jews and Christ's mode of treating them, John selects the case of Nicodemus. He was one of those who were much impressed by the miracles of Jesus, and were prepared to attach themselves to any movement in His favour. He belonged to the Pharisees; to that party which, with all its narrowness, pedantry, dogmatism, and bigotry, still preserved a salt of genuine patriotism and genuine godliness, and reared high-toned and cultivated men like Gamaliel and Saul. Nicodemus, whether a member of the Sanhedrim's deputation to the Baptist or not, certainly knew the result of that deputation, and was aware that a crisis in the national history had arrived. He could not wait for the community to move, but felt that whatever conclusion regarding Christ the Pharisees as a body might arrive at, he must on his own responsibility be at the bottom of those extraordinary events and signs that clustered round the person of Jesus. He was a modest, reserved, cautious man, and did not wish openly to commit himself till he was sure of his ground. He has been blamed for timidity. I would only say that, if he felt it dangerous to be seen in the company of Jesus, it was a bold thing to visit Him at all. He went by night; but he went. And would that there were more like him, who, whether cautious to excess or not, do still feel constrained to judge for themselves about Christ; who feel that, no matter what other men think of Him, there is an interest in Him which they cannot wait for others to settle, but must for themselves settle before they sleep.
Probably Nicodemus made his visit by night because he did not wish to precipitate matters by calling undue attention to the position and intentions of Jesus. He probably went with the purpose of urging some special plan of action. This inexperienced Galilean could not be supposed to understand the populace of Jerusalem as well as the old member of the Sanhedrim, who was familiar with all the outs and ins of party politics in the metropolis. Nicodemus would therefore go and advise Him how to proceed in proclaiming the kingdom of God; or at least sound Him, and, if he found Him amenable to reason, encourage Him to proceed, and warn Him against the pitfalls that lay in His path. Modestly, and as if speaking for others as much as for himself, he says: "Rabbi, we know that Thou art a Teacher come from God, for no man can do these miracles that Thou doest except God be with Him!" There is here neither patronizing acknowledgment nor flattery, but merely the natural first utterance of a man who must say something to show the state of his mind. It served to reveal the point at which Nicodemus had arrived, and the ground on which the conversation might proceed. But "Jesus knew what was in man." In this acknowledgment of His miracles on the part of Nicodemus, Jesus saw the whole mental attitude of the man. He saw that if Nicodemus had uttered all that was in his mind he would have said: "I believe you are sent to restore the kingdom to Israel, and I am come to advise with you on your plan of operation, and to urge upon you certain lines of action." And therefore Jesus promptly cuts him short by saying: "The kingdom of God is quite another thing than you are thinking of; and the way to establish it, to enlist citizens in it, is very different from the way you have been meditating."
In fact, Jesus was becoming embarrassed by His own miracles. They were attracting the wrong kind of people--the superficial worldly people; the people who thought a daring and strong hand with a dash of magic would serve all their turn. His mind was full of this, and as soon as He has an opportunity of uttering Himself on this point He does so, and assures Nicodemus, as a representative of a large number of Jews who needed this teaching, that all their thoughts about the kingdom must be ruled by this principle, and must start from this great truth, that it was a kingdom into which the Spirit of God alone could give entrance, and could give entrance only by making men spiritual. That is to say, that it was a spiritual kingdom, an inward rule over the hearts of men, not an outward empire--a kingdom to be established, not by political craft and midnight meetings, but by internal change and submission in heart to God--a kingdom, therefore, into which admission could be given only on some more spiritual ground than the mere circumstance of a man's natural birth as a Jew.