“So we are not to be surprised that Elijah and Moses, meeting with Jesus on the Mount of Transfiguration had this [Jesus upcoming crucifixion] as their key topic of conversation. ‘And behold there talked with him two men, which were Moses and Elijah; who appeared in glory, and spake (and continued to speak) of his decease which he should accomplish at Jerusalem.’
Of course they talked about it, because they had a stake in this. It was important for them not merely as a theological proposition, but the salvation of Moses and Elijah rested upon this single point — the coming death of Jesus on Calvary's cross. The disciples who were there that day had a stake in this too, because if Jesus had not died upon the cross they too would have had no salvation. And let us say to each one who reads this: we have a stake in this, for there is no salvation possible to us unless Jesus died on Calvary's cross.” (Francis Schaeffer, True Spirituality)
The wood engraving represented here is "Crucifixion" which Gustave Dore did in his illustrations for The Bible in London in 1866.