Genesis 45:27

When they told Jacob about the honor of Joseph, about the wisdom with which he administered his affairs and about how their last judgment was more bitter than the first, their father asked them and said, "Did you not ask Joseph how or why he …

Despite these words and the fact that they brought what he had sent, the carts and the gifts sent by Joseph, only with difficulty did they succeed in convincing their father that what they had told him was a lie. In fact, when Jacob saw the carts that had been sent to carry him down to Egypt, "he gained new life," the text says. This old graybeard, all stooped and bent, suddenly takes on new vigor and heart: observe the text says, "he gained new life." What is the force of "he gained new life"? Just as the light of the lamp, when the supply of oil runs out and the light is on the point of going out, suddenly emits a brighter flame … when someone puts in a little oil, in just the same way this old man … on the point of expiring from disappointment … next learned that Joseph was alive and was in charge of Egypt. Seeing the carts, "he gained new life," the text says. From being old, Jacob became young; he put aside the cloud of disappointment; he repelled the storm in his mind and then found himself at peace, with God disposing everything so that the good man should enjoy relief from all these awful trials and share the happiness of his son. In particular, the dream was to be fulfilled that Jacob himself had interpreted in the words, "Do you mean to say that I and your mother and your brothers will come to bow to the ground before you?"

What Latin expresses by saying: "his spirit was revived," is written in Greek anezōpyrēsen. This means not so much to revive as to rekindle, so to speak, and reignite. This expression is usually used when, perhaps in some material, the fire fails to the point that it appears to be extinguished; and if perhaps it is renewed when kindling has been added, it is said to have been rekindled. Or if the light of a lamp should reach the point that it is thought to have gone out, if perhaps it be revived when oil has been poured in; although the expression is less refined, the lamp is said to have been rekindled. One will speak similarly also of a torch or other lights of this kind.This expression seems to indicate something like this also in Jacob. As long as he was far from Joseph and received no information about his life, his spirit had failed in him, as it were, and the light which was in him had been darkened, as the kindling already failed. But when those who reported to him about Joseph's life came, that is, those who said that "the life was the light of all people," he rekindles his spirit in himself, and the brightness of the true light is renewed in him.

But at length Jacob is convinced of the truth of the story, especially when he sees the waggons which were sent to carry him (for seeing is believing), then his spirit revived. Death is as the waggons which are sent to fetch us to Christ: the very sight of it approaching should revive us.

When he saw the waggons his spirit revived - Now Jacob is called Israel, for he begins to recover his wonted vigour. It pleases him to think that Joseph is alive. He saith nothing of Joseph's glory, which they had told him of; it was enough to him that Joseph was alive: it pleases him to think of going to see him.