Chasidut על משלי 9:1

The number seven recalls the days of the week and also God’s creation of the world. On each of the seven days of creation, He formed a different elemental spiritual force. These spiritual forces devolved into the material world.³⁶See further later lessons where the further depths to the creation narrative are revealed. The number seven symbolizes these forces and the totality of the natural world’s origins.³⁷See the Collected Writings of Rabbi Samson Raphael Hirsch (1808-1888), vol. 3, pgs. 96-111. Rabbi Hirsch develops the theory that the number seven represents completeness, as in the verse, “Wisdom has hewed out its seven pil-lars” (Prov. 9:1). The seven pillars of wisdom represent all the knowledge in the world. Rabbi Hirsch then symbolically interprets details of many laws such as the seven sprinklings of blood of animals offered as offerings, and the seven branches of the menorah as representing a totality.