The liturgy is, before everything else, the joyous gathering of those who are to meet the risen Lord and to enter with him into the bridal chamber. And it is this joy of expectation and this expectation of joy that are expressed in singing and ritual, in vestments and in censing, in that whole beauty of liturgy which has so often been denounced as unnecessary and even sinful.
Unnecessary it is indeed, for we are beyond the categories of the “necessary.” Beauty is never “necessary,” “functional” or “useful.” And when, expecting someone whom we love, we put a beautiful tablecloth on the table and decorate it with candles and flowers, we do all this not out of necessity, but out of love. And the Church is love, expectation and joy. It is heaven on earth, according to our Orthodox tradition; it is the joy of recovered childhood, that free, unconditional and disinterested joy which alone is capable of transforming the world.
“…It is in the highest sense the life of a child, in which everything is picture, melody and song. Such is the wonderful fact which the liturgy demonstrates: it unites act and reality in a supernatural childhood before God.”
From chapter two in For the Life of the World by Alexander Schmemann (29-31), with the last portion being quoted from Romano Guardini’s 1950 book The Church and the Catholic, and the Spirit of the Liturgy (180-181).