'Certainly' in the Bible

Is the Law then contrary to the promises of God? Certainly not! For if a system of law had been given which could impart life, then righteousness (right standing with God) would actually have been based on law.

But I say, walk habitually in the [Holy] Spirit [seek Him and be responsive to His guidance], and then you will certainly not carry out the desire of the sinful nature [which responds impulsively without regard for God and His precepts].