11 Bible Verses about Holiness,  Worldly Separation

And, again calling the multitude, He said to them, "Hear Me, all of you, and understand: there is nothing from without the man, that, entering into him, can defile him; but the things proceeding out of the man are those that defile the man." OMITTED TEXT.read more.
And, when He entered into the house from the multitude, His disciples asked of Him the parable. And He saith to them, "Are ye too thus without understanding? Do ye not perceive that nothing, entering into a man from without, can defile him; because it goes not into his heart, but into the belly, and passes out into the drain?" This He said, making all foods clean.

But Peter said, "By no means, Lord! because never at any time did I eat anything common or unclean."

crying out, "Men of Israel, help! This is the man who teaches all men everywhere against the people, and the law, and this place! and, further, he brought Greeks also into the temple, and has defiled this holy place!"

Anyone, having set aside Moses' law, dies without mercy on the testimony of two or three witnesses; of how much worse punishment, think ye, shall he be accounted worthy, who trampled under foot the Son of God, and accounted the blood of the covenant with which He was sanctified an unholy thing, and treated with contempt the Spirit of grace?

But a certain man, Ananias by name, with Sapphira his wife, sold a possession, and kept back part of the price, his wife also knowing it; and, bringing a certain part, he laid it at the apostles' feet. But Peter said, "Ananias, why did Satan fill your heart, that you should lie to the Holy Spirit, and keep back part of the price of the land?read more.
While remaining, did it not remain your own? and, when sold, did it not continue in your own authority? Why did you conceive in your heart this thing? You did not lie to men, but to God." And Ananias, hearing these words, falling down, expired; and great fear came upon all who heard it; but the young men, rising up, wrapped him round; and, bearing him out, buried him. Now it came to pass about three hours after, that his wife also, not knowing what had happened, came in; and Peter made answer to her, "Tell me, if ye sold the place for so much?" And she said, "Yes, for so much." But Peter said to her, "Why is it that it was agreed by you to tempt the Spirit of the Lord? Behold, the feet of those who buried your husband are at the door, and they will carry you out." And she immediately fell at his feet, and expired; and, coming in, the young men found her dead; and, carrying her forth, they 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 chose you out of the world, on this account the world hates you.

Adulteresses! know ye not that the friendship of the world is enmity with God? Whosoever, therefore, purposes to be a friend of the world makes himself an enemy of God.

But ye are "an elect race, a kingly priesthood, a holy nation," a people for a possession, that ye may show forth the excellencies of Him Who called you out of darkness into His marvelous light; who once were not a people, but are now God's people; who had not obtained mercy, but now have obtained mercy. Beloved, I beseech you as sojourners and pilgrims, to abstain from fleshly desires, which, indeed, war against the soul;

I have given them Thy word, and the world hated them, because they are not of the world, even as I am not of the world. I pray not that Thou shouldest take them out of the world, but that Thou shouldest keep them from the evil one. They are not of the world, even as I am not of the world.

Nevertheless, the firm foundation of God has been standing, having this seal, "The Lord knew those who are His:" and "Let every one who names the name of the Lord depart from unrighteousness."

A religion, pure and undefiled with our God and Father, is this: to visit orphans and widows in their tribulation, and to keep himself unspotted from the world.