Portae Lucis in Latin or ‘Sha’are Orah’ (שערי אורה), in Hebrew, is usually translated as Gates of Light in English.  It is the title of the 13th century Kabbalah classic by Yosef Gikatilla.

Below the Latin words, is written (translated from the Hebrew): This is the gate to Adonai (the Tetragrammaton); righteous ones may come through it.  It does not say  Only Israel or Only Torah scholars may come through it; the righteous ones of the world, seeking to come close to God and thereby gain God’s favor and friendship (and protection), are invited to study and learn and live by it.

Here is an excerpt from Gates of Light translated by Aryeh Kaplan, Meditation and Kabbalah, p. 135