'Holy' in the Bible

Jude, a servant of Jesus Christ and the brother of James, to those of God's selection who have been made holy by God the Father and are kept safe for Jesus Christ:

Beloved, while I was making every effort to write you about our common salvation, I was compelled to write to you [urgently] appealing that you fight strenuously for [the defense of] the faith which was once for all handed down to the saints [the faith that is the sum of Christian belief that was given verbally to believers].

For certain men have come among you secretly, marked out before in the holy Writings for this evil fate, men without the fear of God, turning his grace into an unclean thing, and false to our only Master and Lord, Jesus Christ.

And Enoch, in the seventh generation from Adam, prophesied about them:Look! The Lord comeswith thousands of His holy ones

How they said to you, In the last days there will be men who, guided by their evil desires, will make sport of holy things.

These are the ones who are [agitators] causing divisions—worldly-minded [secular, unspiritual, carnal, merely sensual—unsaved], devoid of the Spirit.

But ye, beloved, building up yourselves on your most holy faith, praying in the Holy Ghost,