3 John 1:8

Therefore, we ought to receive such as these, that we may be fellow workers for the truth.
"we ought to receive." ᾽Απολαμδάνειν is taken for ἀναλαμδάνεσθαι, that is, to receive as when it is said: "They received me like a lion ready for prey." (Ps. 17:12) Moreover, this instructs us not to wait for the needy until they come to us, but rather to run to and follow them: like Abraham and Lot. (Gen. 8)

Hence it is said to Gaius through John concerning certain traveling brothers: "For they went forth for the name of Christ, taking nothing from the Gentiles. We therefore ought to receive such persons, that we may be fellow workers for the truth." For he who provides temporal assistance to those who have spiritual gifts becomes a fellow worker in those very spiritual gifts. For since few are those who receive spiritual gifts, and many are those who abound in temporal things, through this the rich insert themselves into the virtues of the poor: by providing comfort to those same holy poor from their riches.

John teaches us that we should not wait for such needy people to come to us but should rather go out and look for them, for that is what Lot and Abraham did.

Therefore, we ought to support such men, etc. The blessed John, who had left all things for Christ, aligns himself with the person of believing rich men, so that he might make them more eager to have compassion on the poor and strangers: nor should it be doubted that he could have truly said what we read Paul to have said: "You yourselves know that these hands ministered to my necessities and to those who were with me. In all things I have shown you that by so laboring you must help the weak, and remember the words of the Lord Jesus, how he said: It is more blessed to give than to receive" (Acts 20). But he calls them co-workers of the truth, because he who provides temporal support to those who have spiritual gifts, becomes a co-worker in those spiritual gifts themselves. For since there are few who have received spiritual gifts, and many who are rich in temporal things, by this the rich incorporate themselves into the virtues of the poor, while they share their riches with these holy poor. Hence the Lord also says: "Whoever receives a prophet in the name of a prophet shall receive a prophet’s reward; and whoever receives a righteous man in the name of a righteous man shall receive a righteous man’s reward” (Matthew 10).

"To receive" is used in the sense of "to take up," "to seize." By this the Apostle teaches us not to wait for the needy to come to us, but to run to meet them ourselves and entreat them to come to us, as Abraham and Lot did (Gen. 18:2–3; 19:1–2).