Actually being holy in everyday life can mean a sorting out of a Believer's thinking, as Peter exhorts:
"... gird up the loins of your mind, be sober and rest your hope fully upon the grace that is to be brought to you at the revelation of Jesus Christ;
as obedient children, not conforming yourselves to the former lusts, as in your ignorance;
but as He who called you is holy, you also
be holy in all your conduct,
because it is written,
"'Be holy, for I am holy',"
1 Peter 1'13-16.
What is the purpose of being holy? Earlier Peter gave the answer:
"That you may proclaim the praises of Him
who called you out of darkness into His marvelous light,"
1 Peter 2'9.
The fact is that a human being's life manifests either uncleanness through sin or holiness through Christ.
For Believers this is the understanding:
"God did not call us to uncleanness, but in holiness," (1 Thessalonians 4'7).
God calls His People in holiness. They are accounted holy (different). That's because they have been born again by the Spirit.
It's from that position that the Father calls His Children to be holy (live differently).
"Holy" is translated in Strong's Concordance from the Greek word hagios as:
holy, holy one or thing; saint; or sacred.
From Romans to Revelation it is mostly rendered saints or holy ones.
This being ascribed as holy is one of the truly awesome things God ascribes to the whole Body of Christ:
a chosen generation,
a royal priesthood,
a holy nation,
His own special people (1 Peter 2'9).
Therefore, Believers are to accept what they are and be the Saints we are declared - and called - to be.