Here is the second and final installment concerning the so-called "Unforgivable Sin." The good news is that a) you can't commit this sin today; no one can, 2) even if you did commit it, you're justified, and 3) even if you weren't justified, the penalty of the sin is not eternal but "eonian," that is, restricted to a period of time. Other than these things, Christians have everything right.
