Holiness is being separated from that which God says is darkness and evil.
2 Corinthians 6:17
Wherefore come out from among them, and be ye separate, saith the Lord, and touch not the unclean thing; and I will receive you,
The Lord does not receive those that just give lip service to being a believer who are still playing around with the world and are not separated unto the Lord as belonging to Him exclusively.
Note how holy or holiness is not mentioned in the verse you quoted!!
And also note what I pointed out that the ground where Moses was standing was called holy!
Is that dirt fallen away from God so that the dirt He made is now evil? How? God made all things, including the whole earth. Was that physical dirt possible to take evil action as opposed to good action. Can that dirt take any action at all??
Let's not be silly. Did we not even read how when Joshua was told that He was not for or against him, even though God was going to us the Israelites to destroy the evil city Jericho. It was not an evil city not used by God because of the dirt in the bricks they made to make the city.
The problem always comes from not actually seeking the Lord and what He says. Is it not written that they will all be taught of God?
I tell you truly, that the definition of Holy that I provided and the explanation was from a prior conversation with the Lord. And the thing is, He always turns out to make sense. The Lord uses certain things He created to glorify Himself and some He does not use to glorify Himself. The holiness concept has to do with what He uses to glorify Himself or not.
And another thing, as already pointed out in my prior post - is that they were called holy by God before they got the instruction!! Did you also miss the "Therefore" in the verse you quoted???? It was because He was going to use them (they were holy unto Him) that He gave them the instruction to "COME OUT FROM THEIR MIDST' after being called " the temple of the living God" and being told He would walk with them, right? Verse 6:16 comes before 6:17!!!
2 Cor 6:16 Or what agreement has the temple of God with idols? For we are the temple of the living God; just as God said,
“I WILL DWELL IN THEM AND WALK AMONG THEM;
AND I WILL BE THEIR GOD, AND THEY SHALL BE MY PEOPLE.
2 Cor 6:17 “Therefore, COME OUT FROM THEIR MIDST AND BE SEPARATE,” says the Lord.
“AND DO NOT TOUCH WHAT IS UNCLEAN;
And I will welcome you.
So, they were holy to God before being told to separate themselves!! You have it backward!! They were the temple of the living God, before getting the instruction to separate themselves. They we are reckon as righteous because we believe, and not because we separate ourselves like He asked. Of course, if we believe He speaks to us there is going to be some effort into doing what He says, but Abraham still had an Ishmeal after the Lord promise Abraham!