“This empowers us, if we cooperate with it, to keep His commandments.”
If any of us could keep His commandments, His Son would not have had to die on the cross.
Even if we are not able to keep them perfectly, God still requires us to follow his commandments:
When Abram was ninety-nine years old the Lord appeared to Abram, and said to him, “I am God Almighty; walk before me, and be blameless. (Genesis 17:1)
"You shall be blameless before the Lord your God." (Deuteronomy 18:1)
There was a man in the land of Uz, whose name was Job; and that man was blameless and upright, one who feared God, and turned away from evil. (Job 1:1)
If you will, you can keep the commandments, and to act faithfully is a matter of your own choice." (Sirach 15:15)
"In the days of Herod, king of Judea, there was a priest named Zechari′ah, of the division of Abi′jah; and he had a wife of the daughters of Aaron, and her name was Elizabeth. And they were both righteous before God, walking in all the commandments and ordinances of the Lord blameless." (Luke 1:5-6)
"Whoever then relaxes one of the least of these commandments and teaches men so, shall be called least in the kingdom of heaven; but he who does them and teaches them shall be called great in the kingdom of heaven. (Matthew 5:19)
And he said to him, “Why do you ask me about what is good? One there is who is good. If you would enter life, keep the commandments.” (Matthew 19:17)
God would not give us commandments and moral precepts to obey if we were not able to keep them. Before the Cross, it was almost impossible to do. As I said, it was the Cross through which we are given grace that we are able to keep them, if not perfectly, at least to the extent we can.