Almost everything under the sun is all about knowledge. The knowledge leads or uncovers the truth then the truth sets you free. According to our Meru culture when one is circumcised he ceases to be called a "kipii" and he is called "nthanka" this comes automatically after passing through the iniator.
The same case happens when one wants to become a witch doctor, Wizard, a seer, they have to go through some teaching and marks are made on their bodies and they receive new names depending on their levels. Some are ordained to the levels of healers such that using some supernatural connection. They can heal you from any kind of disease and the same can make you fall sick with a mysterious disease that eventually can cause your death on their command.
Some posses powers to make you rich, through a connection that makes customers flow into your business. This all comes with a price to pay. All this knowledge is tapped from the world of spirits and the amusing thing is that many pastors have visited them to grow their business "church" and thus why they will not tell you that once you're a sinner you're called a sinner but when you meet with Christ Jesus your name changes to a saint. This is because it is only a saint who can receive all that comes from the most High God but they serve a different god.
In old testament, salvation is compared to circumcision and that was a stamp for God's children because once circumcised it can't be reversed. In the new testament it is compared to second birth and once you're born it's done unless you die. So therefore seek knowledge and it will lead you to knowing the truth and the truth shall set you free.