Paul confesses in Romans 7 that his 'inner self' delights in God's law, using a compound verb that normally describes shared joy (rejoicing with others). Here the 'co-rejoicing' is internal: the renewed mind finds common cause with Torah's righteousness, even as the flesh wars against it. The συν- prefix may signal the believer's alignment with God's delight in holiness, a participatory joy mirroring divine pleasure in the law.