Aurora opens with Böhme's most audacious claim: that God has a nature, and that this nature is structured. The seven Quellgeister — source-spirits or quality-spirits — are not angels or attributes in the scholastic sense but living powers, the first articulations of the Ungrund's primordial desire. They come in pairs of opposites — astringency and sweetness, bitterness and fire, love and sound — with wisdom (Sophia) as the seventh that encompasses and reveals them all.
The sevenfold structure is not unique to God. Böhme's fundamental claim is that nature — the visible world of minerals, plants, planets, and bodies — is the same seven powers expressed in material form. The astringent quality appears in salt; the sweet in water; the bitter in sulphur; fire in the stars; love in living growth; sound in the movement of air. To know nature is to know, in a mirror, the inner life of God. Natural science and mystical theology point to the same structure.
The seven spirits are also present in the human soul. Health — physical, moral, and spiritual — consists in their proper balance and interplay. Disease, sin, and spiritual death are disorders of the sevenfold constitution: one quality run riot at the expense of the others. Böhme's medicine, ethics, and spirituality are all, at bottom, theories of this inner equilibrium. The Way to Christ is ultimately about restoring the soul to its proper sevenfold harmony.
The seven nature-spirits do not map neatly onto either the Platonic seven planetary spheres or the Kabbalistic sephiroth, though Böhme was familiar with both traditions. They are his own synthesis, and later interpreters — particularly the Cambridge Platonists and German Romantics — debated how precisely they should be understood.