But grow (auxanete de). Present active imperative of auxanw, in contrast with such a fate pictured in verse Galatians 17 , "but keep on growing." In the grace and knowledge (en cariti kai gnwsei). Locative case with en. Grow in both. Keep it up. See on Galatians 1:1 for the idiomatic use of the single article (tou) here, "of our Lord and Saviour Jesus Christ." To him (autwi). To Christ. For ever (ei hmeran aiwno). "Unto the day of eternity." So Sirach 18:9f. One of the various ways of expressing eternity by the use of aiwn. So ei ton aiwna in John 6:5 ; John 12:34 .