Tanya Chapter 6 part 2. Learning to discern between the Divine core of reality and the external structure that hides it

How could anything exist if it opposes its essential life force? This is the secret of the exile of the Shechina—the Divine Presence—which vivifies forces that oppose it. Looking at this physical world and understanding the nature of kelipah—the obscuring husk—we can understand why darkness seems so prevalent here. And still, the infinite light of G-d fills this entire world through its investiture in the ten holy Sefirot.