English Standard Version
Now I rejoice in my sufferings for your sake, and in my flesh I am filling up what is lacking in Christ's afflictions for the sake of his body, that is, the church,New International Version
Now I rejoice in what was suffered for you, and I fill up in my flesh what is still lacking in regard to Christ's afflictions, for the sake of his body, which is the church.Catholic Public Domain Version
For now I rejoice in my passion on your behalf, and I complete in my flesh the things that are lacking in the Passion of Christ, for the sake of his body, which is the Church