PaulThomson said:
So, before the foundation of the world, did God have an intimate relationship with the elect individuals that He had not yet created?
An appeal to mystery shows a weak case for your proposition.
Maybe foreknow does not always mean the relational way of knowing. Maybe it
can mean conceptual knowing. And maybe here it just means conceptual knowing. That would remove the need to appeal to mystery.
I think FollowerofShilohis is pointing out, in quoting John, that the Saviour was foreknown relationally before the foundation of the world, but the elect were foreknown only conceptually before the foundation of the world and become relationally known, as Christ has always been relationally known, when they become in Christ by faith.