God is revealed as perfect interior holiness.
Isaiah 6:3
"Holy, holy, holy is the Lord of hosts!" they (the
Seraphim) cried one to the other.
We are called to that same holiness.
Leviticus 19:2
"Speak to the whole Israelite community and tell them:
Be holy, for I, the Lord your God, am holy."
1 Peter 1:15-16
As he who called you is holy, be holy yourselves in
every aspect of your conduct, for it is written,
"Be holy because I (am) holy."