In the introduction to the book Imrei Yosef by the ADMOR of Spinka, he writes there in the name of Rav Chaim Eliezer the meaning of the verse, “The glory of God is to conceal the matter and the glory of kings is to delve in the matter” (Proverbs 25).
He explained that if a person wants to learn the wisdom of Kabbalah, to know how many worlds and Sefirot there are, meaning the glory of God, to know the greatness of His glory, “conceal the matter.”
But if one wants to learn the wisdom, to know how to crown the Creator and how to serve Him with intention and sanctify one’s 248 organs and make them a vehicle for the Kedusha [holiness], this is called “the glory of kings,” how to crown and serve Him. In that case, “delve in the matter.”