"The treasure of gospel light and grace is put into earthen vessels. The ministers of the gospel are weak and frail creatures, and subject to like passions and infirmities as other men; they are mortal, and soon broken in pieces. And God has so ordered it that the weaker the vessels are the stronger his power may appear to be, that the treasure itself should be valued the more. Note, There is an excellency of power in the gospel of Christ, to enlighten the mind, to convince the conscience, to convert the soul, and to rejoice the heart; but all this power is from God the author, and not from men, who are but instruments, so that God in all things must be glorified."

-Matthew Henry's Concise Commentary