Theophylact of Ohrid
Catena Aurea · Lukasevangelium 12
Fear not, little flock; for it is your Father’s good pleasure to give you the kingdom. Sell that ye have, and give alms; provide yourselves bags which wax not old, a treasure in the heavens that faileth not, where no thief approacheth, neither moth corrupteth. For where your treasure is, there will your heart be also.
Moreover, because all things are not taken away by theft, He adds a more excellent reason, and one which admits of no objection whatever, saying, For where your treasure is, there will your hearts be also; as if He says, “Suppose that neither moth corrupts nor thief takes away, yet this very thing, namely, to have the heart fixed in a buried treasure, and to sink to the earth a divine work, that is, the soul, how great a punishment it deserves.”