"It is necessary for the following reason to pray at this hour and truly those men of holy memory who handed on the Tradition to us taught us thus: because in this hour every creature hushes for a brief moment to praise the Lord; stars and plants and waters stand still in that instant; all the hosts of the angels ministering unto Him together with the souls of the righteous praise God.
"Wherefore it is right for all them that believe to be careful to pray at that hour. And to this the Lord says thus, 'Behold a cry was made a midnight of them that said, 'Behold the Bridegroom has come; arise to meet Him; and He adds, saying, Watch therefore, for ye know not in what hour He comes.'"
St. Hippolytus of Rome.