6114. 'For the corn which they were buying' means that they were to be sustained by this. This is clear from the meaning of 'corn' as truth that the Church possesses, dealt with in 5402; and from the meaning of 'buying' as making one's own, dealt with in 4797, 5374, 5397, 5406, 5410, 5426, and therefore being sustained. For spiritual food, meant by 'corn', is what is referred to here, and when this food is made a person's own it sustains his spiritual life.