We may ask why, after Jesus’ Resurrection, he stood on the shore to receive the disciples, whereas before he walked on the sea. The sea signifies the world, which is tossed about with various causes of tumults, and the waves of this corruptible life; the shore, by its solidity, symbolizes rest.
The disciples then, in as much as they were still upon the waves of this mortal life, were laboring on the sea; but the Redeemer, having by his Resurrection thrown off the corruption of the flesh, stood upon the shore.
ST. GREGORY THE GREAT Homilies on the Gospel of John