Did not our heart burn within us? Their recognition of Christ led the disciples to a lively perception of the secret and hidden grace of the Spirit, which he had formerly bestowed upon them. For God sometimes works in his people in such a manner, that for a time they are not aware of the power of the Spirit, (of which, however, they are not destitute,) or, at least, that they do not perceive it distinctly, but only feel it by a secret movement. Thus the disciples had formerly indeed felt an ardor, which they now remember, but which they had not then observed: now that Christ has made himself known to them, they at length begin to consider the grace which they had formerly, as it were, swallowed without tasting it, and perceive that they were stupid. For they accuse themselves of indifference, as if they had said, "How did it happen that we did not recognize him while he was talking? for when he penetrated into our hearts, we ought to have perceived who he was." But they conclude that he is Christ, not simply from the bare sign that his word was efficacious to inflame their hearts, but because they ascribe to him the honor which belongs to him, that when he speaks with the mouth, he likewise inflames their hearts inwardly by the warmth of his Spirit. Paul, indeed, boasts that the ministration of the Spirit was given to him, (2-Corinthians 3:8;) and Scripture frequently adorns the ministers of the word with such titles as the following; that they convert the hearts, enlighten the understandings, and renew men so as to become pure and holy sacrifices; but then it is not to show what they do by their own power, but rather what the Lord accomplishes by means of them. But both belong equally to Christ alone, to pronounce the outward voice, and to form the hearts efficaciously to the obedience of faith. It cannot be doubted that he then engraved an uncommon Mark on the hearts of these two men, that they might at length perceive that in speaking he had breathed into them a divine warmth. For though the word of the Lord is always fire, yet a fiery rigor was at that time manifested in a peculiar and unusual, manner in the discourse of Christ, and was intended to be an evident proof of his divine power; for it is he alone who baptizeth in the Holy Ghost and in fire, (Luke 3:16.) Yet let us remember that it is the proper fruit of heavenly doctrine, whoever may be the minister of it, to kindle the fire of the Spirit in the hearts of men, to purify and cleanse the affections of the flesh, or rather to burn them up, and to kindle a truly fervent love of God; and by its flame, as it were, to carry away men entirely to heaven.

Our heart burn within us - This is an expression denoting the deep interest and pleasure which they had felt in his discourse before they knew who he was. They now recalled his instruction; they remembered how his words reached the "heart" as he spoke to them; how convincingly he had showed them that the Messiah ought to suffer, and how, while he talked to them of the Christ that they so much loved, their hearts glowed with intense love. This feeling was not confined to them alone. All the followers of Jesus know how precious and tender are the communications of the Saviour, and how the heart glows with love as they think or hear of his life, and sufferings, and death.
He opened to us - He explained to us the Scriptures. See Luke 24:27.
This narrative shows us,
1. How blind people may be to the plainest doctrines of the Scriptures until they are explained to them. These disciples had often read or heard the Scriptures, but never, until then, did they fully understand that the Messiah must suffer.
2. It is proper there should be those whose office it is to explain the Scriptures. Jesus did it while on earth; he does it now by his Spirit; and he has appointed his ministers, whose business it is to explain them.
3. If people attempt to explain the Bible, they should themselves understand it. They should give their time and talents to a suitable preparation to understand the sacred volume. Preaching should consist in "real," and not "fancied" explanations of the Scriptures; the real doctrines which "God" has taught in his word, and not the doctrines that "men" have taught in their systems.
4. Here was convincing evidence that Jesus was the Messiah. This was but one of many instances where Jesus convinced his disciples, contrary to their previous belief. In this case the evidence was abundant. He first satisfied them from the Old Testament that the very things which had happened were foretold; he then dissipated every doubt by showing "himself" to them and convincing them that he was truly the Christ. There was no chance here for deception and juggling. Who would have met them and talked with them in this way but the real Saviour? Who would have thought of writing this narrative to help an imposture? What impostor would have recorded the dulness of the disciples as to the plain declarations of the Old Testament, and "then" have thought of this device to prop up the narrative? Everything about this narrative - its simplicity - its tenderness - its particularity - its perfect nature - its freedom from all appearance of trick - shows that it was taken from real life; and if so, then the Christian religion is true, for here is evidence that Jesus rose from the dead.

Did not our heart burn within us - His word was in our heart as a burning fire, Jeremiah 20:9. Our hearts waxed hot within us, and while we were musing the fire burned, Psalm 39:3. In some such way as this the words of the disciples may be understood: but there is a very remarkable reading here in the Codex Bezae; instead of καιομενη, burned, it has κεκαλυμμενη, veiled; and one of the Itala has, fuit excaecatum, was blinded. Was not our heart veiled (blinded) when he conversed with us on the way, and while he unfolded the Scriptures to us, seeing we did not know him?

And they said one to another,.... After Christ was gone, being surprised at what happened, that they should not know him all that while; and that as soon as they did, he should disappear, or withdraw himself in this manner:
did not our hearts burn within us while he talked with us by the way, and while he opened to us the Scriptures? concerning himself, his sufferings, death, and resurrection, which are in Moses, the Prophets, and the Psalm. The Scriptures are as a sealed book to men, learned and unlearned; and none so fit to open them as the lion of the tribe of Judah: he did open and explain them to these his disciples, as well as conversed with them about other things, as they travelled together; and his words came with such evidence, power, and sweetness, that they were ravished with them; their minds were irradiated with beams and rays of divine light; their hearts were warmed and glowed within them; they became fervent in spirit, and their affections were raised and fired; they found the word to be as burning fire within them; and they now knew somewhat what it was to be baptized with fire, which is Christ's peculiar office to administer; see Psalm 39:3 they seem as it were not only to reflect on these things with wonder and pleasure, but also to charge themselves with want of thought, with inattention and stupidity; since they might have concluded from the uncommon evidence, force, and energy with which his words came to them, who he was, seeing no man could speak as he did, and with such effect as his words had.

They now tell each to the other how their hearts burned--were fired--within them at His talk and His expositions of Scripture. "Ah! this accounts for it: We could not understand the glow of self-evidencing light, love, glory that ravished our hearts; but now we do." They cannot rest--how could they?--they must go straight back and tell the news. They find the eleven, but ere they have time to tell their tale, their ears are saluted with the thrilling news, "The Lord is risen indeed, and hath appeared to Simon." Most touching and precious intelligence this. The only one of the Eleven to whom He appeared alone was he, it seems, who had so shamefully denied Him. What passed at that interview we shall never know here. Probably it was too sacred for disclosure. (See on Mark 16:7). The two from Emmaus now relate what had happened to them, and while thus comparing notes of their Lord's appearances, lo! Christ Himself stands in the midst of them. What encouragement to doubting, dark, true-hearted disciples!

Did not our heart burn within us - Did not we feel an unusual warmth of love! Was not our heart burning, &c.