Gregory of Nyssa
Catena Aurea · Lukasevangelium 15
Either what woman having ten pieces of silver, if she lose one piece, doth not light a candle, and sweep the house, and seek diligently till she find it? And when she hath found it, she calleth her friends and her neighbours together, saying, Rejoice with me; for I have found the piece which I had lost. Likewise, I say unto you, there is joy in the presence of the angels of God over one sinner that repenteth.
(lib. de Virgin. c. 12.) Or else; this I suppose is what our Lord sets before us in the search after the lost piece of silver, that no advantage attaches to us from the external virtues which He calls pieces of silver, although all of them be ours, as long as that one is lacking to the widowed soul, by which in truth it obtains the brightness of the Divine image. Wherefore He first bids us light a candle, that is to say, the divine word which brings hidden things to light, or perhaps the torch of repentance. But in his own house, that is, in himself and his own conscience, must a man seek for the lost piece of silver, that is, the royal image, which is not entirely defaced, but is hid under the dirt, which signifies its corruption of the flesh, and this being diligently wiped away, that is, washed out by a well-spent life, that which was sought for shines forth. Therefore ought she who has found it to rejoice, and to call to partake of her joy the neighbours, (that is, the companion virtues,) reason, desire, and anger, and whatever powers are observedround the soul, which she teaches to rejoice in the Lord. Then concluding the parable, He adds, There is joy in the presence of the angels over one sinner that repenteth.