Have you ever wondered if you’re wise or have been endowed by God with wisdom?  John Calvin will clear this up for you:

But without controversy, just as man was made for meditation upon the heavenly life, so it is certain that the knowledge of it was engraved upon his soul.  And if human happiness, whose perfection it is to be united with God, were hidden from man, he would in fact be bereft of the principal use of his understanding.  Thus also, the chief activity of the soul is to aspire thither.  Hence the more anyone endeavors to approach to God, the more he proves himself endowed with reason. (Institutes, 1.15.6)

The more you endeavor to approach God through His Word, the more evident your wisdom becomes.