Впрочем, до чего мы достигли, так и должны мыслить и по тому правилу жить.
Nevertheless, whereto we have already attained, let us walk by the same rule, let us mind the same thing.
however, let us keep living by that same standard to which we have attained.
Only let us hold true to what we have attained.
Only let us live up to what we have already attained.
Nevertheless, to the degree that we have already attained, let us walk by the same rule, let us be of the same mind.
But we must hold on to the progress we have already made.
But whereto we have attained, [let us] walk in the same steps.