Ambrose of Milan

And so he comes; whether you eat or drink, if you call upon Christ he is present, saying, "Come, eat of my bread and drink of my wine." Even if you are asleep, he is knocking at the door. He comes, I say, frequently and reaches in through the window. Frequently (but not always and not to everyone) he comes to that soul which can say, "At night I had put off my garment." For in this night of the world the garment of corporeal life is first to be taken off as the Lord divested himself in his flesh that for you he might triumph over the dominions and powers of this world.