‘From henceforth let no man trouble me, for I bear branded on my body the marks (stigmata) of Jesus.'
He has finished what he wanted to say. Let them make their choice. They must choose either those who are branded with the mark of circumcision, or he who has been crucified with Christ and is branded with the marks of Jesus. If they choose circumcision they should have nothing more to do with him, for they will bear the brand that has cut them off from Christ.
It may well be that Paul is here not thinking just of metaphorical marks, but of physical marks. He had suffered much for Christ, enduring beatings and other ill-treatment, and he may well have seen the marks so obtained as a faint reflection and reminder of the marks that Jesus bore. He had shared in Christ's crucifixion (Colossians 1:24). And there may here be the suggestion that the marks he bore were greater far, and more significant, than the mark of circumcision, for they pointed to the crucified Christ and the scandal of the cross.
Alternately the thought may be that the marks he bore marked him off as a devotee of Jesus Christ, and that therefore they must beware how they treated him. Herodotus wrote, ‘If any man receives holy stigmata (marks), giving himself to a god, it is not lawful to touch him.' Thus Paul may be declaring his invulnerability to all that they could do.