The whole liturgical life of the Church revolves around the Eucharistic sacrifice and the sacraments. -CCC, no. 1113
Sacraments of Initiation: Baptism, Confirmation, and Eucharist
Sacraments of Healing: Confession and Anointing of the Sick
Sacraments at the Service of Communion: Holy Orders and Matrimony
"The sacraments are efficacious signs of grace, instituted by Christ and entrusted to the Church, by which divine life is dispensed to us through the work of the Holy Spirit." -CCC, no. 1131
"For believers, the sacraments of the New Covenant are necessary for salvation... The Fruit of the sacramental life is that the Spirit of adoption makes the faithful partakers of the divine nature" CCC, no. 1129