Augustine of Hippo — as excerpted in the Catena Aurea on Luke 24:25-35

“(ut sup.) Or because the Lord feigned as if He would go farther, when He was accompanying the disciples, expounding to them the sacred Scriptures, who knew not whether it was He, what does He mean to imply but that through the duty of hospitality men may arrive at a knowledge of Him; that when He has departed from mankind far above the heavens, He is still with those who perform this duty to His servants. He therefore holds to Christ, that He should not go far from him, whoever being taught in the word communicates in all good things to him who teaches. (Gal. 6:6.) For they were taught in the word when He expounded to them the Scriptures. And because they followed hospitality, Him whom they knew not in the expounding of the Scriptures, they know in the breaking of bread. For not the hearers of the law are just before God, but the doers of the law shall be justified. (Rom. 2:13.)”