11 Bible Verses about Holiness,  Worldly Separation

And calling all the people to Him, He said unto them, Hear me all of you, and understand, There is nothing without a man, which entring into him can defile him: but the things proceeding from him are those which defile a man. If any one hath ears to hear, let him hear.read more.
And when He was come into the house, away from the multitude, his disciples asked Him concerning the meaning of the parable. And He saith unto them, Are ye so void of understanding also? Do ye not know, that whatsoever from without entreth into a man cannot defile him? because it entreth not into his heart, but into the belly, and goeth out into the draught, purging all his food.

But Peter said, By no means, Lord; for I have never eaten any thing polluted or unclean.

this is the man that teaches all men every where against the people of the Jews, and the law, and this sacred place? and besides, hath brought Greeks too into the temple, and polluted this holy place.

If any one that violateth the law of Moses, dieth without mercy under two or three witnesses, of how much greater punishment, think ye, shall he be counted worthy, who hath trampled under foot the Son of God, and accounted the blood of the covenant, by which he was sanctified, an unholy thing, and abused the Spirit of grace?

But a certain man named Ananias, together with Sapphira his wife, sold a possession, and secreted part of the price, his wife also being conscious to it; and bringing: some part, laid it at the feet of the apostles. But Peter said, Ananias, why hath Satan so filled thine heart, that thou shouldst lie to the holy Ghost, and keep back part of the price of the land?read more.
While it remained, did it not remain thy own? and when sold, was it not in thy own power? what is the meaning that thou hast taken this into thine heart? Thou hast not lyed to men, but to God. And Ananias at the hearing of these words fell down and expired: and great fear came on all that heard these things. And some of the young men arose, and wrapped him up; and they carried him out, and buried him. And about the space of three hours after, his wife also came in, not knowing what had happened. And Peter said to her, Tell me whether ye sold the land for so much. And she said, Yes, for so much. Then Peter said unto her, Wherefore have ye agreed together to tempt the Spirit of the Lord? behold the feet of those, who have been burying thy husband, now at the door, and they shall carry thee out. And immediately she fell down at his feet and expired: and the young men coming in found her dead, and they carried her out and buried her by her husband.

If ye were of the world, the world would love its own: but because ye are not of the world, but I have chosen you out of the world, therefore the world hateth you.

Ye adulterers and adulteresses, know ye not that the friendship of the world is enmity to God? whosoever therefore will be a friend of the world becomes an enemy of God.

But ye are a chosen generation, a royal priesthood, a holy nation, a peculiar people; that ye should declare the glories of Him, who hath called you out of darkness into his marvellous light: who heretofore were not a people, but are now the people of God: who had not obtained mercy, but now have obtained mercy. Dearly beloved, I exhort you as strangers and sojourners here, to abstain from carnal lusts, which war against the soul:

I have given them thy word; and the world hath hated them, because they are not of the world, even as I am not of the world. I do not pray that Thou wouldest take them out of the world, but that thou wouldest keep them from the evil. They are not of the world, even as I am not of the world.

However, the foundation of God standeth firm, having this inscription, The Lord knoweth them that are his; and, Let every one that nameth the name of Christ depart from iniquity.

Pure and uncorrupt religion before God and our Father is this, to take care of orphans and widows in their affliction, and to keep himself unspotted from the world.