Amen, I say to you, if you have faith the size of a mustard seed,
you will say to this mountain,
‘Move from here to there,’ and it will move.
Nothing will be impossible for you.”
-- Mt 17:14-20
A sacramental celebration is a meeting of God's children with their Father, in Christ and the Holy Spirit; this meeting takes the form of a dialogue, through actions and words. Admittedly, the symbolic actions are already a language, but the Word of God and the response of faith have to accompany and give life to them, so that the seed of the Kingdom can bear its fruit in good soil. The liturgical actions signify what the Word of God expresses: both his free initiative and his people's response of faith.
-- CCC 1153