"His divine power has bestowed on us everything we need for life and holiness through our knowledge of the One who called us by his own glory and power." 2 Peter 1:3
Sacraments are sacred signs through which Jesus gives us His Spirit and Grace to transform us and unite us to Christ. Jesus acts through the Sacraments when we receive them under the proper conditions.
There are seven Sacraments of the Catholic Church: Baptism, Confirmation, Holy Eucharist, Reconciliation, Anointing of the Sick, Holy Orders and Matrimony. Some are confered once in a lifetime: Baptism, Confirmation, Holy Orders. Others, like Holy Eucharist and Reconciliation may be received frequently.