R. Isaiah ben Abraham Horowitz (ca. 1565-1630), Shenei Luhot ha-Berit (Amsterdam, 1648), 3a

Jewish Mysticism
The revealed is the hidden, i.e., the revealed is the disclosure of the hidden and its dissemination. It follows that the revealed is the hidden. Thus it is with respect to matters of the Torah- the revealed is not an independent matter in relation to the hidden, in accord with the view of the masses who hold that the hidden way is separate and the revealed way separate. This is not the case, but rather the hidden evolves [through a chain] and is revealed. To this the verse alludes, “Like golden apples in silver showpieces is a phrase well turned” (Prov. 25-11). That is to say, just as the silver approximates the gold but it is on a lower level, so is the revealed in relation to the hidden.

Translated by Elliot Wolfson in- “Beautiful Maiden Without Eyes- Peshat and Sod in Zoharic Hermeneutics.” In The Midrashic imagination – Jewish exegesis, thought, and history. Edited by Michael Fishbane, Albany – State University of New York Press, 1993, pp. 155-203.