But these are the pairs which the distribution joins together; 104 and if the things be assigned in this manner, the distribution is just.

This joining, then, of a to c and of b to d is that which is just in distribution; and that which is just in this sense is a mean quantity, while that which is unjust is that which is disproportionate; for that which is proportionate is a mean quantity, but that which is just is, as we said, proportionate.