Luke 15:9

(Orat. xlv. 26.) But the piece of silver being found, He makes the heavenly powers partakers of the joy whom He made the ministers of His dispensation, and so it follows, And when she had found it, she calls together her friends and neighbours.

Either they are friends as performing His will, but neighbours as being spiritual; or perhaps His friends are all the heavenly powers, but His neighbours those that come near to Him, as Thrones, Cherubims, and Seraphims.

(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 observed round 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.

(de Quæst. Ev. lib. 2. qu. 33.) Or by the nine pieces of silver, as by the ninety and nine sheep, He represents those who trusting in themselves, prefer themselves to sinners returning to salvation. For there is one wanting to nine to make it ten, and to ninety-nine to make it a hundred. To one He assigns all who are reconciled by repentance.