In The Eucharist: Sacrament of the Kingdom (St Vladimir Seminary Press, 1987) Schmemann exemplifies the Orthodox stress on the sacraments as the means by which not only individual Christians, but the entire created universe, is sanctified and enabled to participate in divine life. The quote below is found on pp 33-34. A hat-tip to the Eclectic Orthodoxy site.
...in the Orthodox ecclesial experience and tradition, a sacrament is understood primarily as a revelation of the genuine nature of creation, of the world, which, however much it has fallen as "this world", will remain God's world, awaiting salvation, redemption, healing and transfiguration in a new earth and a new heaven. In other words, in the Orthodox experience a sacrament is primarily a revelation of the sacramentality of creation itself, for the world was created and given to man for conversion of creaturely life into participation in divine life. If in baptism water can become a "laver of regeneration", if our earthly food--bread and wine--can be transformed into partaking of of the body and blood of Christ, if, to put it briefly, everything in the world can be identified, manifested, and understood as a gift of God and participation in the new life, it is because all of creation was originally summoned and destined for the fulfillment of the divine economy--"then God will be all in all."