A Christian can be used as a servant of Satan by not standing in the Truth.

If we obey Satan we are effectively his servant.

The greatest sin a Christian can commit is to deny or to suppress the Truth.

In the GreatCommission we are commanded to speak the Truth, not just hold it in our hearts.

Whenever we resist sharing the Truth we enable a lie which deceives and brings the hearer into bondage.

Whenever we compromise on the Truth we are effectively supporting darkness and bondage.