Mostly to the lost Mel?
Have you never been convicted of sin since you have been saved brother?
"love one another" and "believe on Him who sent me", these are at least two of the commandments we are under.
Also I am led of the Spirit. He has never led me into sin. I do that on my own if and when I respond to the lusts of my flesh and when I do, I put myself under the law of sowing and reaping and then yes the law comes into play and I have fear.
RE:Your question "how does the Spirit speak to us?"
You already know that Mel because all the children of God have ears to hear Him, though they can refuse.
Romans 8:16 The Spirit itself beareth witness with our spirit, that we are the children of God:
Let me put it another way, I don't need the law of Moses or the Ten Commandments to tell me when I have sinned, when the Spirit of God is grieved, He lets me know.
Hebrews 12:6 For whom the Lord loveth he chasteneth, and scourgeth every son whom he receiveth.
We are not under the law as a principle of life. We have the indwelling Spirit of God to guide and correct us.
If a person has apage love - His love infused in our hearts for God and our fellow man, we don't need the external law written on tables of stone we have an internal law of agape love written in our hearts.
Romans 13:10 Love worketh no ill to his neighbour: therefore love is the fulfilling of the law.
We are they who have the indwelling Law of Christ through being born of the Spirit, it is the lawless who need the law of Moses.
1 Timothy 1:9 Knowing this, that the law is not made for a righteous man, but for the lawless and disobedient, for the ungodly and for sinners, for unholy and profane, for murderers of fathers and murderers of mothers, for manslayers...
I understand where people are coming from when they repond to evil in the midst of the church(es) by trying to stress commandment keeping.
But it's the wrong approach - sanctification does not come via the law or the Ten Commandments.
Galatians 3
2 This only would I learn of you, Received ye the Spirit by the works of the law, or by the hearing of faith?
3 Are ye so foolish? having begun in the Spirit, are ye now made perfect by the flesh?
...
12 And the law is not of faith: but, The man that doeth them shall live in them.
Our sanctification is a transformation through the Spirit of of God as we behold the Glory of Jesus Christ in the word and with prayer and meditating upon His glory.
John 1:14 And the Word was made flesh, and dwelt among us, (and we beheld his glory, the glory as of the only begotten of the Father,) full of grace and truth.
2 Corinthians 3:18 But we all, with open face beholding as in a glass the glory of the Lord, are changed (Grk - metamorphoo) into the same image from glory to glory, even as by the Spirit of the Lord.
If we were under the law of Moses for eternity it could never bring this transformation.
HankD