Non-Cals often argue that God would not require of man what he is not able to do, such as believe. Non-Cals argue it would be unjust for God to punish a man for unbelief if it were impossible for him to do so. Calvinists often respond that God gave man the law and it is impossible for man to keep the law, therefore it is not unjust for God to demand from a man what he is not able to do. The question is, can man keep the law? Is he able? The scriptures say YES! Luke 1:5 There was in the days of Herod, the king of Judaea, a certain priest named Zacharias, of the course of Abia: and his wife was of the daughters of Aaron, and her name was Elisabeth. 6 And they were both righteous before God, walking in all the commandments and ordinances of the Lord blameless. The scriptures say that Zacharias and his wife walked in ALL the commandments and ordinances of the Lord BLAMELESS. I am not saying that Zacharias was not a sinner. In fact, we see in this story that Zacharias did not at first believe God's promise and was struck dumb, unable to speak because he did not believe. Nevertheless, concerning the commandments and ordinances of God, the scriptures themselves say Zacharias AND his wife kept ALL of them BLAMELESS. So, is it really true that it is impossible for man to obey God's laws?