Theodoret of Cyrus
Why does the law instruct the priest to receive the right shoulder and breast from every sacrifice made for salvation (Ex. 29:26-28)? The symbolism of the breast signifies that the priest is to lead a life of understanding and contemplation, representing a safeguard for the heart. Meanwhile, the metaphor of the right shoulder signifies the importance of righteous actions, as faith by itself is not adequate for salvation; it is essential to couple it with deeds for true fulfillment.