Theophylact of Ohrid
Catena Aurea · Lukasevangelium 14
Lk 14, Verses 34–35English original
Salt is good: but if the salt have lost his savour, wherewith shall it be seasoned? It is neither fit for the land, nor yet for the dunghill; but men cast it out. He that hath ears to hear, let him hear.
But because His discourse was in parables and dark sayings, our Lord, in order to rouse His hearers that they might not receive indifferently what was said of the salt, adds, He that hath ears to hear,let him hear, that is, as he has wisdom let him understand. For we must take the ears here as the perceptive power of the mind and capacity of understanding.