But I am... — Better, Seeing that I am. The fact which follows is not contrasted with that which precedes, but given as its ground. The might of Jehovah is seen in the storm-waves of the sea. It is seen not less in the fall and rise of empires.
Related Commentaries of Isaiah 51:15
Isaiah 51:15
15 But I am the LORD thy God, that divided the sea, whose waves roared: The LORD of hosts is his name.