John Gill

Nevertheless, whereto we have already attained,.... Whatever degree of knowledge of Christ, and the truths of his Gospel, is attained to, let it be retained, and not departed from: let us walk by the same rule; either the doctrine of justification by Christ's righteousness in particular, which is a rule of judgment concerning other things; for so far as they agree or disagree with this, they are to be received or rejected; or the Scriptures of truth, which are the rule of faith and practice, and the standard and test, to which all are to be brought and tried: let us mind the same thing; be of one heart and affection to each other, Rom 12:10, and of the same judgment in the doctrines of the Gospel, Co1 1:10, and pursue the same measures; particularly press towards the same mark, and for the same prize the apostle did, Phi 3:14, and be followers of him, as is exhorted to in Phi 3:17.