Once he was useless to you, but now he is indeed useful to you as well as to me.

but I did not want to do anything without first getting your consent, so that your goodness would not be, in effect, by compulsion but of your own free will.

no longer as a slave, but [as someone] more than a slave, as a brother [in Christ], especially dear to me, but how much more to you, both in the flesh [as a servant] and in the Lord [as a fellow believer].