1 When our Lord Christ, foretelling His own passion, and the fruitfulness of His death in being lifted up on the cross, said that He would draw all [things] after Him; and when the Jews, understanding that He spoke of His death, put to Him the question how He could speak of death as awaiting Him, when they heard out of the law that Christ abides for ever; He exhorted them, while still they had in them the little light, which had so taught them that Christ was eternal, to walk, to make themselves acquainted with the whole subject, lest they should be overtaken with darkness. And, when He had said this, He hid Himself from them. With these points you have been made acquainted in former Lord's day lessons and discourses.
Source: Tractates on the Gospel of John (New Advent)