What repels demons?

Secular answer

Demons are a part of almost every religion in the world. It seems that religion needs demons as much as demons need religion.

Atheism repels demons. When you no longer believe in religion, demons no longer exist.

If you believe in demons, there are many types of advice on how to repel them. Salt is said to be able to repel demons because it is pure.

Religious answer

To start with, the following are anathema to demons:confidence, happiness, cleanliness and order, ritual purity, and godliness.