yet for love’s sake I prefer to appeal to you—I, Paul, an ambassador and now a prisoner also for Christ Jesus—
διὰ τὴν ἀγάπην μᾶλλον παρακαλῶ, τοιοῦτος ὢν ὡς Παῦλος πρεσβύτης νυνὶ δὲ καὶ δέσμιος Χριστοῦ Ἰησοῦ·
Ver. 9. Yet for love's sake, I rather beseech you.
As if he had said, I know indeed that I can effect it by commanding with much authority, from things which have already taken place. But because I am very solicitous about this matter, I beseech you. He shows both these things at once; that he has confidence in him, for he commands him; and that he is exceedingly concerned about the matter, wherefore he beseeches him.
[For moral, see Phm 1:16]
Haydock Catholic Bible Commentary: Philemon
I rather beseech thee, thou being such a one, as Paul. That is, united to him in spirit, by the same faith and charity; I am therefore confident thou wilt not refuse the request of Paul, now an aged man, and a prisoner, for the sake of Jesus Christ. Wi.