John Calvin on 1 Corinthians 16:3-4

3. And when I come As we are cheerful in giving, when we know for certain, that what we give is well laid out, he points out to the Corinthians a method, by which they may be assured of a good and faithful administration — by selecting approved persons, to whom they may intrust the matter. Nay more, he offers his own services, if desired, which is an evidence that he has the matter at heart.