There are seven sacraments of the Catholic Church, which according to Catholic theology, were instituted by Jesus and entrusted to the Church. Sacraments are visible rites seen as signs and efficacious channels of the grace of God to all those who receive them with the proper disposition. The sevenfold list of sacraments is often organized into three groups: the sacraments of initiation (into the Church, the body of Christ), consisting of Baptism, Confirmation, and the Eucharist; the sacraments of healing, consisting of Penance and Anointing of the Sick; and the sacraments of service: Holy Orders and Matrimony.
The Latin word sacramentum means "a sign of the sacred." The seven sacraments are ceremonies that point to what is sacred, significant and important for Christians. They are special occasions for experiencing God's saving presence. That's what theologians mean when they say that sacraments are at the same time signs and instruments of God's grace.
For Catholics, the Sacrament of Baptism is the first step in a lifelong journey of commitment and discipleship. Whether we are baptized as infants or adults, Baptism is the Church's way of celebrating and enacting the embrace of God.