Truth means it is conformable to fact. It is correct. Truth in action, is when the human conscience agrees with the intellect. Truth is 'ONE'. Any variation in the one truth is not truth at all, but error.
Truth is a person.
It is our conscience that examines these laws. Free will' gives us the ability to make the right or the wrong decision in GOD's eyes. GOD made the laws, and over and over again, He has urged us to do right, and warned us against doing wrong. If we did not have 'free will', there would be no need for urging or warnings. By using free will, we decide which course of action will be taken for each individual incident we face in life.