Thine heart shall fear; rather, shall throb; "beat with excitement." Because the abundance of the sea shall be converted unto thee; i.e. the maritime commerce, which has hitherto enriched other nations, shall be turned thy way and be at thy disposal.
The forces of the Gentiles; rather, the riches of the Gentiles—as in Isaiah 8:4; Isaiah 10:14; Isaiah 30:6; Isaiah 61:6. Details of the riches fellow in Isaiah 61:6-9.