53 To this purpose it is written: "You have desired wisdom; keep the commandments, and the Lord shall give it you." The commandments are those concerning righteousness, and the righteousness is that which is by faith, surrounded with the uncertainty of temptations; so that understanding is the reward of a pious belief of what is not yet understood. The meaning I have given to these words, "You have desired wisdom; keep the commandments, and the Lord shall give it you," I find also in the passage, "Unless ye believe, you shall not understand;" showing that as righteousness is by faith, understanding comes by wisdom.
Accordingly, in the case of those who eagerly demand evident truth, we must not condemn the desire, but regulate it, so that beginning with faith it may proceed to the desired end through good works. The life of virtue is one of toil; the end desired is unclouded wisdom. Why should I believe, says one, what is not clearly proved? Let me hear some word which will disclose the first principle of all things. This is the one great craving of the rational soul in the pursuit of truth.
And the answer is, What you desire is excellent, and well worthy of your love; but Leah is to be married first, and then Rachel. The proper effect of your eagerness is to lead you to submit to the right method, instead of rebelling against it; for without this method you cannot attain what you so eagerly long for. And when it is attained, the possession of the lovely form of knowledge will be in this world accompanied with the toils of righteousness. For however clear and true our perception in this life may be of the unchangeable good, the mortal body is still a weight on the mind and the earthly tabernacle is a clog on the intellect in its manifold activity. The end then, is one, but many things must be gone through for the sake of it.
Source: Reply to Faustus the Manichaean (New Advent)