Exodus 20
And God spoke all these words, saying,
"I am the LORD your God, who brought you out of the land of Egypt, out of the house of slavery.
"You shall have no other gods before me.
"You shall not make for yourself a carved image, or any likeness of anything that is in heaven above, or that is in the earth beneath, or that is in the water under the earth. You shall not bow down to them or serve them, for I the LORD your God am a jealous God, visiting the iniquity of the fathers on the children to the third and the fourth generation of those who hate me, but showing steadfast love to thousands of those who love me and keep my commandments.
"You shall not take the name of the LORD your God in vain, for the LORD will not hold him guiltless who takes his name in vain.
"Remember the Sabbath day, to keep it holy. Six days you shall labor, and do all your work, but the seventh day is a Sabbath to the LORD your God. On it you shall not do any work, you, or your son, or your daughter, your male servant, or your female servant, or your livestock, or the sojourner who is within your gates. For in six days the LORD made heaven and earth, the sea, and all that is in them, and rested on the seventh day. Therefore the LORD blessed the Sabbath day and made it holy.
"Honor your father and your mother, that your days may be long in the land that the LORD your God is giving you.
"You shall not murder.
"You shall not commit adultery.
"You shall not steal.
"You shall not bear false witness against your neighbor.
"You shall not covet your neighbor’s house; you shall not covet your neighbor’s wife, or his male servant, or his female servant, or his ox, or his donkey, or anything that is your neighbor’s."
Now when all the people saw the thunder and the flashes of lightning and the sound of the trumpet and the mountain smoking, the people were afraid and trembled, and they stood far off and said to Moses, "You speak to us, and we will listen; but do not let God speak to us, lest we die." Moses said to the people, "Do not fear, for God has come to test you, that the fear of him may be before you, that you may not sin." The people stood far off, while Moses drew near to the thick darkness where God was.
2 Corinthians 3
Such is the confidence that we have through Christ toward God. Not that we are sufficient in ourselves to claim anything as coming from us, but our sufficiency is from God, who has made us competent to be ministers of a new covenant, not of the letter but of the Spirit. For the letter kills, but the Spirit gives life.
Now if the ministry of death, carved in letters on stone, came with such glory that the Israelites could not gaze at Moses’ face because of its glory, which was being brought to an end, will not the ministry of the Spirit have even more glory? For if there was glory in the ministry of condemnation, the ministry of righteousness must far exceed it in glory. Indeed, in this case, what once had glory has come to have no glory at all, because of the glory that surpasses it. For if what was being brought to an end came with glory, much more will what is permanent have glory.
Since we have such a hope, we are very bold, not like Moses, who would put a veil over his face so that the Israelites might not gaze at the outcome of what was being brought to an end. But their minds were hardened. For to this day, when they read the old covenant, that same veil remains unlifted, because only through Christ is it taken away. Yes, to this day whenever Moses is read a veil lies over their hearts. But when one turns to the Lord, the veil is removed. Now the Lord is the Spirit, and where the Spirit of the Lord is, there is freedom. And we all, with unveiled face, beholding the glory of the Lord, are being transformed into the same image from one degree of glory to another. For this comes from the Lord who is the Spirit.
Now for those who claim that the Holy Spirit was given to help us obey the Law, to empower us to keep the Old Covenant, they must be crazy. It is so clear that the ministry of the Spirit is something separate and completely different from the Old Covenant, perhaps that's why God chose to call this the NEW Covenant. It is a whole new system, built on different and better promises, in that these promises depend on Christ's work and not on our obedience to any commands or standards. It is such an all-encompassing and vastly superior system that the old crumbles away to nothing as the temporary prop it was meant to be. You see, Jesus disarmed evil, that is, Satan and his principalities, by cancelling the written code that stood opposed to us. When our record of debt was cancelled on the cross, God no longer opposed us because our sin was completely removed.
If you try to incorporate any part of the old system, the law, that is the knowledge of good (morality), you will be blind to the truth of who Jesus really is and what he has done. You will nullify faith, because the law is not of faith. The Law KILLS faith,and faith, my friend, is your only hope. No amount of earnestness or zeal or striving will help you draw any nearer to our God who is perfect and holy, not able to bear any amount of sin in his presence. And no amount of fear or grovelling on your part will change that, only simple trust in the loving kindness of Jesus whose sacrifice has been examined and accepted by the Father. So if you will not accept the sacrifice God has called perfect, there is no hope for you. If you truly accept the sacrifice, you will not feel the need to add anything AT ALL to it yourself. You will not feel compelled to pay him back by your love or gratitude, by your songs of worship, by making hard choices, by tithing or going to church, by being in relationships with people you don't like, to clean your house or submit to your husband or love your wife, etc,etc,etc...
So what will be your motivation to live righteously and shun sin? You won't need motivation to behave yourself anymore! Because you will be free.