An elect child of God will have a new nature, which God gives them. The elect are BORN literally of God's own Spirit. Once you are born again of God's Spirit (Of His flesh and of His bone) He said, "I will put My Spirit IN you and cause you to follow My decrees" Ezekiel 36:27
As a new creature, born of God, and His Spirit living In you, it's Him moving you to obey. In your old fallen nature, you could never choose to obey. It's all God's work in you for even obeying. He gets the credit so none can boast.
Yes, a calvinist (as I am) sins, falls short of God's glory and stumbles, but will NOT stop loving the Lord or desiring His will. He makes His desire become our desire. We are ONE with Him in Spirit and therefore desire to obey Him, we don't feel forced. Obeying Him and loving Him becomes natural to our new nature. If God's child sins, we will feel immediate conviction over that sin and be disciplined for that sin. Just because there is no condemnation in Christ, does not mean we are to abuse His grace and keep sinning. In fact, if we keep living a life of sin without caring or it doesn't matter to us if we grieve the Spirit, then are we truly regenerate?
If you hurt Him with your sin, He'll show you and you will KNOW it and not want to hurt Him anymore. It's all about a new nature which God chose to give you when He chose to elect you.