Holiness is GOD’s standard for His people. “Like Father like son.” If He is our Father, we WILL be like Him and He is HOLY. If we are NOT like Him, we are not His child.
Holiness require receiving correction form out Father and making appropriate changes to be holy like Him.
If God doesn’t discipline you as he does all of his children, it means that you are illegitimate and are not really his children at all. Hebrews 12:8