6 And the soul that turneth after such as have familiar spirits, and after wizards, to go a whoring after them, I will even set my face against that soul, and will cut him off from among his people. 

7 Sanctify yourselves therefore, and be ye holy: for I am the Lord your God. 

8 And ye shall keep my statutes, and do them: I am the Lord which sanctify you.

27 A man also or woman that hath a familiar spirit, or that is a wizard, shall surely be put to death: they shall stone them with stones: their blood shall be upon them.

Verse 6 condemns those who seek the services of wizards, witches, or other occult practitioners. It mentions a penalty of being cut off but does not specify what that entails. The fact that God is the one doing the cutting off suggests this is a spiritual separation, not a legal action. But that is only for the one who goes to the witches and the wizards. As for those occult practitioners themselves, the witches and the wizards, the death penalty applies. They have made it their work to lead people away from the true Lord, let alone how their services are exceedingly dark and immoral acts. Some accounts suggest that they would provide poisons for assassination and abortifacients, as well as serve in sexual rituals intended to create copulation between humans and demons.

Moving on to verses 7 and 8, these two verses speak of being sanctified. Obviously, we heard a great deal about the sanctification of the tabernacle, its instruments, and the priests who operated therein, but there was also a sanctification for the common Israelite as well. To be sanctified means to take that which is basic and earthy, and setting it apart to be dedicated to higher and holier purposes. Thus, anyone who chooses to live a life defined first by their commitment to God is living a sanctified life. You might work in the world, but if in your work you seek to be honest and industrious, keeping your commitment to God to do fairly by your fellow man, then your worldly work is an act of sanctification to God.

Obviously dealing with the occult would be a form of unsanctification, but so would having any other idol as the chief interest in our daily affairs. Be it greed or pleasure or praise. Whatever we do towards those pursuits is unsanctified, even if it is religious in nature, and we run afoul of the injunctions in these verses.