John Chrysostom
And therefore our Lord goes on to shew that all these things did not happen in a common way, but from the predestined purpose of God. Hence it follows, And beginning at Moses and all the Prophets, he expounded to them in all the Scriptures the things concerning himself. As if He said, Since ye are slow I will render you quick, by explaining to you the mysteries of the Scriptures. For the sacrifice of Abraham, when releasing Isaac he sacrificed the ram, prefigured Christ’s sacrifice. But in the other writings of the Prophets also there are scattered about mysteries of Christ’s cross and the resurrection.
This was said not of their bodily eyes, but of their mental sight.
For He did not shew Himself to all at the same time, in order that He might sow the seeds of faith. For he who had first seen and was sure, told it to the rest. Afterwards the word going forth prepared the mind of the hearer for the sight, and therefore He appeared first to him who was of all the most worthy and faithful. For He had need of the most faithful soul to first receive this sight, that it might be least disturbed by the unexpected appearance. And therefore He is first seen by Peter, that he who first confessed Christ should first deserve to see His resurrection, and also because he had denied Him He wished to see him first, to console him, lest he should despair.
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But after Peter, He appeared to the rest, at one time fewer in number, at another more, which the two disciples attest; for it follows, And they told what things were done by the way, and how he was known of them in breaking of bread.