Sacraments are visible signs (water; oil; verbal communication; etc) of the invisible gracious action of the Lord. As human beings, we use signs all the time: the hand shake, the hug, signs of frustration and so forth. Because we have a body, we need to use them in some fashion to communicate tenderness, friendship and even aggression. God, in His graciousness, uses similar visible signs, to communicate His invisible and gracious self.
In baptism, we use water. As we pour water, the Invisible and Good Lord pours His saving and sanctifying grace and help, to heal us and interiorly lead us to our conscience, and to His secret guidance from within. In baptism we receive the healing touch of God, through the sign of water.
The first and foremost sacrament, is Jesus Himself. He is a sacred sign, visible to our eyes, through which the Father expresses His loving presence. The second basic sacrament is the Church. The Church too, her members, are a visible sign of God's healing presence. From these two, flow the other seven major signs which we call, formally, the SEVEN sacraments: Baptism, confirmation, Eucharist, Penance, Sacrament of the sick, Matrimony and sacrament of order (ordination of pastors). You can click onto any of the sacraments below, to be a better understanding of them, and our parish requirements for each.
The Lord bless you abundantly.