Moses de Leon, Sefer ha-Mishqal, p. 130.

Jewish Mysticism
You should know that the Holy One, blessed be He, created man with wisdom and made him an admixture of all of the spiritual things above and all of the physical things below, and he is the secret of the paradigm of God [sod dugmat elohim], in that he is in the paradigm of above and below, and they are all in man in a concealed manner, and they are known to the finders of favor… We find that man is in the secret of the concealed and the revealed. Revealed from the secret of this world, and concealed from the secret of the world above, and therefore man encompasses all of the worlds.

Translated by Hartley Lachter