Proverbs 25:2-4

New Revised Standard Version, Anglicised Catholic Edition

² It is the glory of God to conceal things,
    but the glory of kings is to search things out.
³ Like the heavens for height, like the earth for depth,
    so the mind of kings is unsearchable.
⁴ Take away the dross from the silver,
    and the smith has material for a vessel;