'I am the Lord your God; consecrate yourselves and be holy, because I am holy.' (Leviticus 11:44) The breath of God in His creation of man imparted the Holiness of God into His new creation. Paul confirms that the moral law of God truly is written on our hearts. This is wild! Knowledge and experience of holiness is within each of us and has been all along.
'As obedient children, do not conform to the evil desires you had when you lived in ignorance. But just as he who called you is holy, so be holy in all you do...' (1 Peter 1:14-15)
And so that no one can brag saying they've become holy due to their own efforts, we know that, 'we have been made holy through the sacrifice of the body of Jesus Christ once for all' (Hebrews 10:10).
God is the standard that never changes. This isn't legalism, you and I are welcome to do as we please, we're free to conform to the worlds standard. However, what pleases us doesn't become the standard. God is holy and holiness doesn't change. Our standards are to be transformed into His.
The Truth of the moral freedom within each of us didn't develop through time via monkey-men, although it's reality has been slowly revealed by the Spirit and set in Scripture. It was instilled in us from the beginning of time, before time began. It was revealed to man as man moved about.
In Christ truth was codified eternally through his sacrifice on our behalf and our breathing in and out of this reality awakens our hearts, souls and minds to Truth as it was, is and will be.