Re: False spirits invading the church & discernment.
I agree with what Rainy said to the post down below, "they say Christ has returned."
Looking to Christ to teach us all things while doing a good study of those books of the bible she mentioned, plus others, will clearly show the true verses the fake.
We need to discern everything by God's word.
Of course, because we are human, we can still interpret the bible in error. But ultimately, if we are depending on Christ, he will lead us into all truth, he's promised that. So there is no need to be worried about understanding everything perfectly. We just need to follow him, trusting him to teach us. The disciples didn't understand a lot of things, but their understanding grew as they followed Jesus.
When I'm confused about something, or trying to give the right words to someone, or don't know what turn to make next, or whatever, I just always pray, Lord lead me, give me the words to say, show me the way. And then see what the scriptures say.
And if we are in Christ, trusting him, we don't have to worry about blaspheming the Holy Spirit.