Fundamental question of philosophy and theology.
I maintain that not all truth is propositional. "God is Holy" is a proposition, yet to explain what is meant by holiness is more than mere words can describe or comprehend. I maintain that certain aspects of God cannot be fully expressed propositionally.
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Philip
Ok, real quick, I'll define an absolute as something that must be either rejected or accepted as whole (ie: you can't accept one part and not another).
Truth, as I stated before, is that which is certain and ultimately indubitable (we, as humans and sinners, of course, will doubt the truth, so in one sense truth is dubitable).
I'm not setting God's love against rationality here, but in a complementary position, much like free will is not set against God's divine decrees.
Part of what I'm trying to get at here is that there are parts of divine revelation that are not propositional in nature. I would consider an experience of God's presence to be a revelation here. I may be able to say "I felt God's presence", but I will not be able to express exactly why or how.
The elephant in the room here is a term that I have used before that I will define--numinous: the experience of feeling the presence of something wholly other. I realize that the term is popular among liberals, the neo-orthodox, and Anglo-Catholics, but I think it needs to be considered in Reformed circles as well.
I would argue that for every Christian, there is, at times, this feeling of the numinous that signals God's presence in a unique way and leaves no room for doubt.
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Philip
The numinous is a particularly apt example, though, because it deals with an awareness of a spiritual realm (and BTW, Satan can, I believe, make use of the numinous, as it is a feature of world religions other than Christianity) and, for a Christian, of God's presence.
I don't think more knowledge would aid us in describing the numinous. The description, for example, in Isaiah 6 of the throne room of God provides great knowledge, but all of the propositions concerning what the prophet experienced merely encircle the actual experience. Even in the reading of it, inspired as it is, there is more in the experience than mere words could ever describe. As it is, the description always sends a tingle up my spine.
Personally, the best expressions of what the numinous feels like are expressed in art rather than propositionally. Music, in particular, can convey something of the numinous. I also think that places may have a sense of God's presence in a unique way (thus why God had the tabernacle and temple built to exact specifications). Gothic cathedrals, in particular, but here I'm just describing my own experience, not any general principle. God uses different vehicles to convey His presence for different people.
Unfortunately, no major works on the subject have been published except for Rudolf Otto's The Idea of the Holy which is, at best, neo-orthodox (though it does contain, I think, some great insights on the effect of certain biblical passages). C. S. Lewis hints at the concept, but doesn't develop it. I'm hoping some reformed theologian will pick up on the topic, but so far it's mostly an Anglican/Roman Catholic thing.
That said, I'll also say that propositional truth is, of course, necessary--I am not trying to denigrate it in any way, simply to put it in its proper place in the created order and in our theology.
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Philip