In Jewish historical study, numbers were believed to be a means for understanding the divine.
[2] Echad Mi Yodea begins with the line "One is Hashem, in the heavens and the earth - אחד אלוהינו שבשמיים ובארץ."
The monotheistic nature of normative Judaism, referenced also as the "oneness of God," is a common theme in Jewish liturgy—such as the central prayer—as well as Rabbinic literature.
[3]Two "defines the concept of evenness,"[4] and can represent God's relationship with humanity or the people Israel.
The two candles may also represent husband and wife, the second soul received on Shabbat, or the division between light and dark in the creation story.