Updated: Jun 11, 2019
A Liturgical and Sacramental Church
The Christian Faith includes not only the doctrine of the Church but its practice, its worship. Orthodoxy necessarily includes orthopraxy. For that which was handed down is nothing less than a way of life which is participation in God's life. Thus, how we worship as Christians is not arbitrary nor is it simply a matter of taste. Rather, the liturgical and sacramental life of the Church is part and parcel of the deposit of faith.
Ongoing participation in the liturgy is ongoing participation in the life of God. Mark Galli, Beyond Smells and Bells
Lex orandi lex credendi ---- the law of prayer is the law of belief. Yes, we express what we believe in worship, but that's not precisely the point of the former. More than that, our belief is shaped by our worship. And the worship of the Church (and this is supremely so in the Holy Eucharist) imitates, mirrors, and joins the very worship of Heaven. Put another way, the liturgy is the earthly dimension of heavenly worship and, yea, even tears asunder that veil which divides (but a while longer) the twin halves of God's one good creation. Thus, the Church – and this is manifested so beautifully in her worship – is the place where heaven and earth overlap. And how can it not be? For in Christ all things in heaven and on earth are reconciled and united; and the Church is nothing less than His mystical body.
The journey [of the liturgy] is to the Kingdom. This is where we are going – and not symbolically, but really. Alexander Schmemann, For the Life of the World