4 For in the case of those who have once been enlightened and have tasted of the heavenly gift and have been made partakers of the Holy Spirit, 5 and have tasted the good word of God and the powers of the age to come, 6 and then have fallen away, it is impossible to renew them again to repentance, since they again crucify to themselves the Son of God and put Him to open shame.
In this series I will exegete the passage to the best of my ability, explaining what I think it means and what it does not mean. And I'll do so without isolating it from the rest of Scripture as so many often do, while not simply saying it can't mean what my friend thinks it means because of such and such other passages. So with that introduction, let's begin with the first clause of the passage.