Augustine of Hippo
Therefore, O Asaph, align your thoughts with your understanding and reveal to us the salvation that God has achieved upon the earth. When the earthly salvation you knew was disrupted, what actions did He take, and what promises did He make? You have established the sea through Your might (Psalms 73:13). It is as if the Jewish people were like dry land, distinct from the turbulent waves, while the Gentiles, in their hostility, filled the sea that surrounded them: behold, by Your power the sea is established, yet the earth continues to long for Your rain. You have established in Your might the sea, and You have defeated the heads of the serpents in the waters. You have crushed those serpents' heads, representative of the pride of demons that the Gentiles once harbored, in the waters; for those whom they controlled, You have liberated through Baptism.