Basil of Caesarea

For as in bodily diseases there are many of which the affected are not sensible, but they rather put faith in the opinion of their physicians, than trust their own insensibility; so also in the diseases of the soul, though a man is not conscious of sin in himself, yet ought he to trust to those who are able to have more knowledge of their own sins.

Catena Aurea by Aquinas ↗

Theophylact of Ohrid

Having heard this, the disciples were troubled. You will learn about this more extensively in the commentary on the Gospel of John (see ch. 13).

Commentary on Luke ↗

Bede

And they themselves began to inquire among themselves who it might be from them who was going to do this. And certainly, the eleven apostles knew that they had not conceived such a thing against the Lord, but they believed the teacher more than themselves, and fearing their own weakness, they sorrowfully inquired about the sin, of which they had no consciousness. Judas also shamelessly inquires, as Matthew and Mark mention, in order to falsely feign a good conscience with boldness.

On the Gospel of Luke ↗

Bonaventure

Third, regarding the purity of the Apostles of Christ, he adds: And they began to inquire among themselves which of them it was who would do this. Bede: "The eleven knew that they had thought nothing of the sort, but they trusted the Master more than themselves"; whence in Matthew twenty-six it is said: "Being greatly saddened, each one began to say: Is it I, Lord?" Whence the Apostles were innocent, because they were neither complicit in the wickedness nor even aware of it. …

Commentary on Luke, Chapter 22 ↗