The Western World, especially Protestantism and to a slightly lesser degree Catholicism, have fallen into the idea that miracles are "supernatural" or rather, something other than natural, which is to deny the naturalness and completeness of us allowing God to interact in our lives and come into us. There is nothing "supernatural" about a miracle, argues Schmemann, it is only when we loose touch with the reality of God in our lives that such things seem to be other than natural. We only come to grips with our real nature when we are worshipping God and participating in the Eucharistic Lituragy, no other act of humanity brings us nearer to our true nature because we are using and offering back up to God, nature, God's creation, in the way it is meant to be used; to praise and worship Him.
Almost as good as "The Mystical Theology of the Eastern Church" but for something which was originally just an essay for seminary students to read, it is truly excellent. Read after "The Orthodox Way" and before "The Mystical Theology of the Eastern Church" since it will act as somewhat of a stepping stone for many people. Definitely worth the read though.