Δ δ (Delta) is the fourth letter of the Greek alphabet, derived from the Phoenician daleth meaning 'door.' Its shape—an equilateral triangle—depicts a triangular door or the tent-flap of nomadic peoples. As a numeral, δ’ equals 4, and it is the root of the Latin and Cyrillic D. In the Greek magical papyri, Delta is often inscribed as the symbol of the tetractys, the fourfold source of creation, and as the cosmic door through which the divine enters matter.

Position on the Tree of Life

On the Tree of Life, Δ δ corresponds to the 14th Path, the Path of Daleth. This path connects Binah (Understanding) to Chokmah (Wisdom) on the Supernal Triangle, a route that runs across the Abyss from the feminine to the masculine. Daleth means 'door,' and the letter’s assignment to this path identifies it as the threshold between the two highest Sephiroth—the veil that is also the passage. In 777, the Greek letter Delta occupies the same cell as the Hebrew letter Daleth, the zodiac sign Venus, the Tarot trump The Empress, and the number 4. The triangular shape of Delta echoes the three paths of the Supernal Triangle, yet here it is the fourth letter (and the fourth path counting from the top), reinforcing the alchemical axiom 'Solve et Coagula'—dissolve and coagulate, the door swings both ways.

Astrological and planetary correspondence

By the attributions of Liber 777, the 14th Path (Daleth) is ruled by Venus. Venus’s energy is that of love, creativity, and attraction, which harmonizes with the number 4 (the square of stability) and the letter Delta as the door that opens to beauty. The triangle of Delta is also the alchemical symbol for fire, but here it is the soft fire of Venus—the warmth that draws, not the flame that consumes. In the Hermetic tradition, the door of Venus is the gateway through which the soul descends into incarnation, drawn by desire.

Historical context

The Greek letter Delta has a rich history in both the mundane and sacred alphabets. In classical Athens, the ‘Δῆλοι’ were the dishonest—those with their fingers pointing downward like a delta—a folk etymology. But the deeper tradition is Pythagorean: the tetractys (a triangle of ten points) was the symbol of the cosmos, and Delta was its letter. The Orphic hymns call Delta the ‘fourfold root of all things,’ and the Platonists assigned it to the Demiurge, who created the four elements. In the magical tradition of the Picatrix, the Delta is inscribed on talismans to open doors (both literal and spiritual), and in the Greek Magical Papyri it appears as a sign to invoke Hekate, the goddess of the crossroads—another door. The early Christian Gnostics, notably the Naassenes, meditated on the letter Delta as the gateway of the Pleroma. In the Mithraic mysteries, the initiate passed through a 'door' painted with a Delta, signifying passage from the material to the spiritual. The shape of the Nile Delta (the triangular floodplain) was also seen as a heavenly door by the Egyptians, who identified it with the rising of the star Sirius. All these streams converge on a single point: Delta is the threshold—between fire and water, between the four elements and the One.

Δ δ appears in column LIII (The Greek Alphabet) at the 14th step, the Path of Daleth, in the table of Liber 777. It is the door that stands between Chokmah and Binah, the fire that is also the gate.