What is a cult?
The only sure way to avoid being deceived.

Materialism is the belief that there is no God and there are no spirits and there are no angels.

Materialism is based on a logical error known as a universal negative.

This belief is taken on faith by Naturalists and Materialists. The faith of Naturalists, Materialists, Atheists, Secular Humanists, and Agnostics is different from Christian faith. The faith of Naturalists, Materialists, Atheists, Secular Humanists, and Agnostics is merely speculation or unsupported declaration. Christian Faith is quite a different substance and authority.  Generally, Atheists, and Agnostics don't like to think of themselves as following any religion.  They may not know it, but their god is self.  They do follow their dogmas more faithfully than most Christians.