Scripture is sufficient, according to 2 Tim 3:16-17, to deal with all issues requiring us to do the right thing. We interpret ordinary facts through Scripture; this is how we judge and make decisions.
Get wisdom and understanding of God's Word, and seek no other source of authority for guidance. Any other source is a challenge to the sufficiency of Scripture, be it intuition, feelings, claims of prophecy or even a profound belief (since there are strong delusions that could endlessly deceive even the elect, were it possible).
On this note, I must declare a temptation some Reformed people may be vulnerable to, namely, the misreading of providences. Those who trust so much in the fact that all things work together for good to them that love God, and who have seen providential mercies in the past, are prone, I suspect, to reading things into providences and thereby claiming as promises things the Lord never promised. Just because certain prayers for a certain outcome seem to be being answered, it does not follow that the desired outcome will ensue. My life has almost been ruined with this error... Be warned!
