What did the early Church believe about baptism?

Baptism in the early Church was never merely symbolic — second- and third-century writers consistently describe it as a transformative washing that remits sins, illuminates the soul, and admits believers to eternal life. Tertullian celebrated it as liberation from blindness: "by washing away the sins of our early blindness, we are set free and admitted into eternal life." Clement of Alexandria linked it to regeneration and the knowledge of God. But the Fathers also debated its boundaries: who may baptize, what formula is required, and whether baptisms performed by heretics are valid at all. Cyprian held that heretics — lacking the Father, Son, and Holy Spirit — cannot baptize, and converts from schismatic groups must be re-baptized. Novatian disagreed, arguing that sincere invocation of Christ's name carries salvific weight even outside the church. Tertullian also counseled delay — recommending that baptism not be rushed for children or the unmarried, since post-baptismal sin carries greater weight than pre-baptismal sin. The convergence across these debates: baptism is a serious, ecclesial, Spirit-conferring act — not a formality.