4:9-13 The love of this world, is often the cause of turning back from the truths and ways of Jesus Christ. Paul was guided by Divine inspiration, yet he would have his books. As long as we live, we must still learn. The apostles did not neglect human means, in seeking the necessaries of life, or their own instruction. Let us thank the Divine goodness in having given us so many writings of wise and pious men in all ages; and let us seek that by reading them our profiting may appear to all.
12. And—Greek, "But." Thou art to come to me, but Tychicus I have sent to Ephesus to supply thy place (if thou so willest it) in presiding over the Church there in thy absence (compare Tit 3:12). It is possible Tychicus was the bearer of this Epistle, though the omission of "to thee" is rather against this view.