“But ye have a custom, that I should release unto you one at the passover: will ye therefore that I release unto you the King of the Jews?”
King James Version (KJV)
18:37 Thou sayest - The truth. To this end was I born - Speaking of his human origin: his Divine was above Pilate's comprehension. Yet it is intimated in the following words, I came into the world, that I might witness to the truth - Which was both declared to the Jews, and in the process of his passion to the princes of the Gentiles also. Every one that is of the truth - That is, a lover of it, heareth my voice - A universal maxim. Every sincere lover of truth will hear him, so as to understand and practise what he saith.
18:38 What is truth? - Said Pilate, a courtier; perhaps meaning what signifies truth? Is that a thing worth hazarding your life for? So he left him presently, to plead with the Jews for him, looking upon him as an innocent but weak man.
Joh 18:39,40 Ye have a custom. See PNT "Mt 27:15". He was eager to comply with the custom in order to release an innocent prisoner, but he had not measured the depths of the Jewish hate which could demand, instead, a robber and a murderer.