Please find below some quotes of the Church Fathers and other theologians in relation to the Gospel of the Third Sunday of Easter (Easter 3A, Lk 24:13-35.):
The Venerable Bede (672/3-735): And as they spoke of Him, the Lord comes near and joins them, that He may both influence their minds with faith in His resurrection, and fulfill that which He had promised, Where two or three are gathered together in my name, there, am I in the midst of them (Mt 18:20).
Theophylact (1055-1107): For having now obtained a spiritual body, distance of place is no obstacle to His being present to whom he wished, nor did He any further govern His body by natural laws, but spiritually and supernaturally. Hence as Mark says, He appeared to them in a different form, in which they were not permitted to know Him; for it follows, And their eyes were held back that they should not know him; in order truly that they may reveal their entirely doubtful conceptions, and uncovering their wound may receive a cure; and that they might know that although the same body which suffered, rose again, yet it was no longer such as to be visible to all, but only to those by whom He willed it to be seen; and that they should not wonder why henceforth He walks not among the people, seeing that His conversation was not fit for mankind, but rather divine; which is also the character of the resurrection to come, in which we shall walk as the Angels and the sons of God.
Origen (182-253/4): “Did not our hearts burn within us while he talked to us on the road, while he opened to us the scriptures?” (Lk 24:32). By which is implied, that the words uttered by the Savior inflamed the hearts of the hearers to the love of God.
Pope St. Gregory the Great (540-614): By the word which is heard the spirit is kindled, the chill of dullness departs, the mind becomes awakened with heavenly desire. It rejoices to hear heavenly precepts, and every command in which it is instructed, is as it were, adding kindling to the fire.