Morning Bish, the comment about Hell being eternity without a mediator is from R. A. Finlayson. He is perhaps little known today but was a brilliant Free Church thrologian. Christian Focus have a great book of his selected writings.
Maybe I'm just being a pedant, but who is this 'God without a mediator'?
I suppose it'd be even better to say that the mediator is there, but not mediating grace to those in hell, but instead mediating wrath. Perhaps a little pedantic, but probably important to add the clarity.
Are the wires getting crossed on what 'mediator' means? Sure, God's never 'unmediated' - we always meet the Father in the Son by the Spirit.But the lost aren't united to Christ, and therefore they have no part in Christ's role as representative. Therefore, those in hell are 'meeting' with God (Father, Son and Holy Spirit) without having Christ interceding for them. That's what 'God without a mediator' means?