8:7-9 Faith is the root; and as without faith it is not possible to please God, Heb 11:6, so those who abound in faith, will abound in other graces and good works also; and this will work and show itself by love. Great talkers are not always the best doers; but these Corinthians were diligent to do, as well as to know and talk well. To all these good things the apostle desires them to add this grace also, to abound in charity to the poor. The best arguments for Christian duties, are drawn from the grace and love of Christ. Though he was rich, as being God, equal in power and glory with the Father, yet he not only became man for us, but became poor also. At length he emptied himself, as it were, to ransom their souls by his sacrifice on the cross. From what riches, blessed Lord, to what poverty didst thou descend for our sakes! and to what riches hast thou advanced us through thy poverty! It is our happiness to be wholly at thy disposal.
7. in faith—(2Co 1:24).
utterance—(See on 1Co 1:5). Not as Alford, "doctrine" or "word."
diligence—in everything that is good.
your love to us—literally, "love from you (that is, on your part) in us" (that is, which has us for its object; which is felt in the case of us).