Church Fathers on Luke 10:31

The lawyer, when praised by our Savior for having answered right, breaks forth into pride, thinking that he had no neighbor, as though there was no one to be compared to him in righteousness. Hence it is said, But he willing to justify himself said to Jesus, And who is my neighbor? For somehow first one sin and then another takes him captive. From the cunning with which he sought to tempt Christ, he falls into pride. But here when asking, who is my neighbor, he proves himself…

He answered that he knew not his neighbor, because he believed not on Christ, and he who knows not Christ knows not the law, for being ignorant of the truth, how can he know the law which makes known the truth?

Now our Savior defines a neighbor not in respect of actions or honor, but of nature; as if He says, Think not that because you are righteous you have no neighbor, for all who partake of the same nature are your neighbors. Be you also their neighbor, not in place, but in affection and solicitude for them. And in addition to this, he brings forward the Samaritan as an example. As it follows, And Jesus answering him said, A certain man went down, &c.