Zohar Hadash, 106b

Jewish Mysticism
‘The enlightened will shine’–These are the ones who contemplate (mistakkelei) the secret of Wisdom in the mysteries of the secrets of Torah, the righteous ones who fulfill the will of their Master and are engaged in Torah day and night. All who are engaged in the [study of] Torah are called maskilim, [for] with wisdom they contemplate (mistakkelan) the secret of the upper Wisdom.

Translated by Elliot Wolfson in Through a Speculum that Shines- Vision and Imagination in Medieval Jewish Mysticism, Princeton- Princeton University Press, 1994.