"Sin, Gehenna, and death do not exist at all with God, for they are effects, not substances. Sin is the fruit of free will. There was a time when sin did not exist, and there will be a time when it will not exist. Gehenna is the fruit of sin. At some point in time it had a beginning, but its end is not known. Death, however, is a dispensation of the wisdom of the Creator. It will rule only a short time over nature; then it will be totally abolished." +Isaac the Syrian
Tomorrow, interestingly enough, is the feast of +Isaac the Syrian.
I think I can hang with you here with one distinction. I would say that free will just isn't possible until after salvation, since we were born with a sin nature. Aside from that, this looks pretty reasonable to me.