The Gospel of Philip is the most philosophically sophisticated of the Nag Hammadi texts covered here — and the most difficult to read. It is not a gospel in the narrative sense at all: it contains no story of Jesus's life, no dialogue sequences, no passion narrative. It is an anthology of theological and philosophical meditations, probably compiled from earlier sources, that addresses the Valentinian Gnostic community's understanding of the sacraments, the nature of the divine, and the path of spiritual transformation.
Valentinian Gnosticism — named after the second-century teacher Valentinus — was the most intellectually developed of the Gnostic schools, engaging seriously with Platonic philosophy, Pauline theology, and the mystery religion traditions of the Hellenistic world. Where Sethian Gnosticism (the tradition of the Gospel of Judas) emphasised cosmic mythology, Valentinian Gnosticism emphasised psychological and sacramental transformation. Philip belongs firmly to this tradition.
The text's central preoccupation is the relationship between visible and invisible reality — between the material symbols through which the sacraments operate and the spiritual realities they embody. This is a deeply sophisticated philosophical position: neither dismissing the material as irrelevant (as more radical Gnostics did) nor treating the material as the ultimate reality (as orthodox Christianity tended to do). The symbol participates in the reality it symbolises. The sacrament actually does what it represents.