Reason is the greatest enemy that faith has: it never comes to the aid of spiritual things, but--more frequently than not --struggles against the divine Word...
Martin Luther, Table Talk (1569)
Are we as God's children in Christ servants of the Word? Yes, we are. Word here Luther is refering to is Scripture. We are servants of the Word, Christ, as well as the word, Scripture.
As servants of the word of God we are in an optimal/most favorable place to be sure that it is the word alone that moves and dictates our existence, not our reason, experience or anything else. That must be our goal and endeavor.
I find Luther's quote here from his Table Talk (I need to get my copy of that) helpful. I find reason always wanting to help in unhelpful ways. Reason thinks it sees and knows best, and that it even sees according to Scripture. Yet I also find that dissecting reason, my reason from Scripture helps me see that it is taking me away from its pure (not in the sense of perfect, but in the sense of unsullied: the word alone) fulfillment of it.
I think a large part of what I'm getting at is found in Proverbs 3:5-6:
Trust in the LORD with all your heart
and lean not on your own understanding;
in all your ways submit to him,
and he will make your paths straight
I find God's help and peace only when I submit to his word and am willing to cast my reason aside.
Reason is a gift from God but it is to be a servant of God's revelation. It is under God's revelation, not over. The problem is when it usurps the place of God's revelation or the place of God himself. And reason cannot be the interpreter of God's revelation found in Scripture and in Jesus Christ.
We are servants of the word of God. Let us live according to that word alone, placing ourselves under it and in so doing under the care, goodness and guidance of God.
What might you add to this?