Eccl 8:17

“Therefore he adds: And I understood that man can find no reason for all the works of God, of those works, namely, which are done under the sun: Sirach 43: "Do not labor, for you will not comprehend." And the more he has labored to seek, the less he will find: whence in the Psalm: "Man shall approach to a deep heart, and God shall be exalted," that is, made distant; Augustine: "God is lofty; you raise yourself up, and He flees from you; you humble yourself, and He comes to you." Even if the wise man says that he knows, he will not be able to find out, that is, if he believes himself to know, he understands less, because it is said in Romans 1: "Professing themselves to be wise, they became fools"; above in chapter seven: "I said: I shall become wise, and it departed further from me." And he repeats the solicitude, adding that it was curious; for to apply solicitude where there is no utility is curiosity. Therefore he says: All these things I pondered in my heart, that I might understand with curiosity; and this is reproved in Sirach 3: "Do not search much into superfluous things, and do not be curious about the many works of His." And thus the solicitude of distinguishing is evident, which was diligent and vain, and therefore curious.”