What is the Unpardonable Sin? Have you committed it? If you do not know what it is then you just don't know whether or not you have committed it.

We are told not to grieve the Holy Spirit,  but what is it that grieves the Holy Spirit? Maybe you have done this sin?

Why did Ananias and Sapphira die after they gave money to Peter? Why was this such a big deal?

What is the proper understanding of the 3rd commandment? You are not to take the LORDS name in vain.

But this teaching is about the Feast of Shavuot, so why am I talking about all of these other things and how are they connected to Shavuot or Pentecost?