Conscience also plays a part in morals, and right moral judgement.
The Spirit moves the conscience of the believer.
One man is convicted that they should not eat meat, while another is free to eat anything.
Both are righteous, as long as they do so in clear conscience, and do so to please God.
You will say "this means that if a person sins with clear conscience, then it is not a sin". That is false, as the Spirit always convict the believer of sin, and never promotes it.
I tell you that the fruit of the Spirit are made known in the Word.