'Be Holy' in the Bible

There is a difference also between a wife and a virgin; the unmarried woman careth about the things of the Lord, to be holy, both in body and in spirit; but she that is married careth about the things of the world, how to please her husband.

according as he chose us in him, before the foundation of the world, that we should be holy and blameless before him;

that he himself might present to himself the church, glorious, having no spot or wrinkle, or any such thing, but that it should be holy and without blemish.

because it is written, "Ye shall be holy, for I am holy."

He that is unjust, let him be unjust still, and he that is filthy, let him be filthy still; and he that is righteous, let him do righteousness still, and he that is holy, let him be holy still.