When Gentiles, who do not have the Law [since it was given only to Jews], do instinctively the things the Law requires [guided only by their conscience], they are a law to themselves, though they do not have the Law.

and [if you] are confident that you are a [qualified] guide to the blind [those untaught in theology], a light to those who are in darkness,

so that the [righteous and just] requirement of the Law might be fulfilled in us who do not live our lives in the ways of the flesh [guided by worldliness and our sinful nature], but [live our lives] in the ways of the Spirit [guided by His power].