john 18:37 Pilate therefore said unto him, Art thou a king then? Jesus answered, Thou sayest that I am a king. To this end was I born, and for this cause came I into the world, that I should bear witness unto the truth. Every one that is of the truth heareth my voice. - Free Bible Online

      37. Art thou a king then?--There was no sarcasm or disdain in this question (as THOLUCK, ALFORD, and others, allege), else our Lord's answer would have been different. Putting emphasis upon "thou," his question betrays a mixture of surprise and uneasiness, partly at the possibility of there being, after all, something dangerous under the claim, and partly from a certain awe which our Lord's demeanor probably struck into him.
      Thou sayest that I am a king--It is even so.
      To this end was I--"have I been."
      born and for this cause came I--am I come.
      into the world, that I may bear witness to the truth--His birth expresses His manhood; His coming into the world, His existence before assuming humanity: The truth, then, here affirmed, though Pilate would catch little of it, was that His Incarnation was expressly in order to the assumption of Royalty in our nature. Yet, instead of saying, He came to be a King, which is His meaning, He says He came to testify to the truth. Why this? Because, in such circumstances it required a noble courage not to flinch from His royal claims; and our Lord, conscious that He was putting forth that courage, gives a turn to His confession expressive of it. It is to this that Paul alludes, in those remarkable words to Timothy: "I charge thee before God, who quickeneth all things, and before Christ Jesus, who, in the presence of Pontius Pilate, witnessed the good confession" (1Ti 6:13). This one act of our Lord's life, His courageous witness-bearing before the governor, was selected as an encouraging example of the fidelity which Timothy ought to display. As the Lord (says OLSHAUSEN beautifully) owned Himself the Son of God before the most exalted theocratic council, so He confessed His regal dignity in presence of the representative of the highest political authority on earth.
      Every one that is of the truth heareth my voice--Our Lord here not only affirms that His word had in it a self-evidencing, self-recommending power, but gently insinuated the true secret of the growth and grandeur of His kingdom--as A KINGDOM OF TRUTH, in its highest sense, into which all souls who have learned to live and count all things but loss for the truth are, by a most heavenly attraction, drawn as into their proper element; THE KING of whom Jesus is, fetching them in and ruling them by His captivating power over their hearts.

JFB.