Fear is a poison
It numbs your senses and mind
Clouds your reasoning
Paralyzes your thinking
...
Read full text
'As your heart races...'. You are right in that fear is a strong negative emotion, almost a passion. Your heart pounds harder, you cannot think clearly either. You involve the reader superbly.
We must have firmness instead of fear because fear benumbs senses and mind and hinders the thinking power. A poem having dark side has been duly presented. Brilliant one.