Nevertheless, whereto we have already attained, let us walk by the same rule, let us mind the same thing.
The expectation of further (Philippians 3:15), 'revelation' is not to make you less careful in walking according to whatever knowledge and perfection you have already attained. God reveals more to those who walk up to the revelations they already have (Hosea 6:3).
Rule, let us mind the same thing. So C Vulgate. Omitted in 'Aleph (') A B. Perhaps inserted from Galatians 6:16 and Philippians 2:2. 'Whereunto we have attained, let us walk on [a military term: march in order: stoichein (G4748)] in the same' (measure of knowledge already attained).