god comes to us in his sacraments
In it's simplest definition, Sacraments are one of the ways God speaks to the world. Instituted by Christ and entrusted to His Church, each of the seven Sacraments include a visible sign we can see, touch, feel and taste which points to God working within us through His Holy Spirit. How this works exactly is a divine mystery we can only trust by faith.
For example, at the Eucharist we begin with ordinary bread and wine we can certainly see, touch and taste. As these two visible signs of God's creation are consecrated using the very words instructed by Jesus, God's grace is known as His Spirit changes the very nature of the bread and wine. They are still there for us to see, but at the same time they become the real presence of our Lord's Body and Blood. And since our Lord is really present, they nourish and sustain our bodies and souls through our faith in Christ.
The seven Sacraments acknowledged by the 4th Ecumenical Council are Baptism, Confirmation, Eucharist, Reconciliation, Anointing the Sick, Matrimony and Holy Orders.