True, so true. This letter is a straight to the point summary of what the devils aim is.
Another way I feel he deceives and confuses is by masquerading in costumes of light and righteousness. Even Satan disguises himself as an angel of light. So it is not strange if his servants also disguise themselves as servants of righteousness.

In other words, Satan has servants who profess enough truth to join the church, and from inside teach what Paul calls “doctrines of demons'' in 1 Timothy 4 . Jesus says they will be like wolves in sheep’s clothing.

Don't be deceived by signs and wonders. Let your confidence be grounded in something far deeper than any supposed inability of Satan to do signs and wonders. Even real signs and wonders in the service of anti-Christian assertions, prove nothing, even when they are done “in the name of Jesus.”“Lord, Lord, did we not do many mighty works in your name?” To which Jesus will reply, “I never knew you; depart from me, you workers of lawlessness” -
Matthew 7:22–23.
The problem was not that the signs and wonders weren’t real, but that they were in the service of sin.

Let your foundation of your Christian faith be on the word of God, and not on signs and wonders, so you'll not be deceived.