We preach not one advent only of Christ, but a second also, far more glorious than the former. For the former gave a view of His patience; but the latter brings with it the crown of a divine kingdom. For all things, for the most part, are twofold in our Lord Jesus Christ: a twofold generation; one, of God, before the ages; and one, of a Virgin, at the close of the ages: His descents twofold; one, the unobserved, like rain on a fleece; and a second His open coming, which is to be. In His former advent, He was wrapped in swaddling clothes in the manger; in His second, He covers Himself with light as with a garment. In His first coming, He endured the Cross, despising shame; in His second, He comes attended by a host of Angels, receiving glory. We rest not then upon His first advent only, but look also for His second. And as at His first coming we said, Blessed is He that comes in the Name of the Lord, so will we repeat the same at His second coming; that when with Angels we meet our Master, we may worship Him and say, Blessed is He that comes in the Name of the Lord.
St. Cyril of Jerusalem, Catechetical Lecture XV
Locus Communis 