Caiaphas - See the notes at Luke 3:2.
Being high-Priest that same year - It is probable that the office of high priest was at first for life, if there was no conduct that rendered the person unworthy the office. In that case the incumbent was removed. Thus Abiathar was removed by Solomon, 1 Kings 2:27. Subsequently the kings, and especially the conquerors of Judea, claimed and exercised the right of removing the high priest at pleasure, so that, in the time of the Romans, the office was held but a short time. (See the Chronological Table.) Caiaphas held the office for about 10 years.
Ye know nothing at all - That is, you know nothing respecting the subject under consideration. You are fools to hesitate about so plain a case. It is probable that there was a party, even in the Sanhedrin, that was secretly in favor of Jesus as the Messiah. Of that party Nicodemus was certainly one. See John 3:1; John 7:50-51; John 11:45; John 12:42; “Among the chief rulers, also, many believed on him,” etc.