What cause the speakers heart beat in poem The Seafarer?

In the Old English poem "The Seafarer", the speaker's heart beats rapidly due to the challenging and perilous nature of his seafaring life. The speaker describes the hardships he encounters at sea, including violent storms, freezing temperatures, and the constant threat of death. These conditions cause his heart to pound faster as he battles against the forces of nature and his own fears.

Here are some specific lines from the poem that mention the speaker's rapid heartbeat:

"My heart leapt up when I heard the storm howl,

And the hard hail crashed down on the deck."

"My heart beat quickly, and I was afraid,

For the sea was so wild and the waves so high."

"My heart was pounding in my chest,

And I felt the cold sweat on my brow."

These lines convey the speaker's intense physical and emotional response to the harsh realities of life at sea. His rapid heartbeat reflects his anxiety, fear, and determination to survive in the face of danger.