The study of the history of words and their meanings
Courageous and determined
The lines are explaining how even though our hearts are beating, they are beating us all the way to the grave. The heart beat is compared to the rhythm of a funeral march with everyone stepping in time. The lines are showing hearts are beating courageously and with determination all the way to the person's death, which is inevitable.
I want to help but what's supposed to be bolded?
Answer:
To write a commentary, write about your observations and analysis of the text you read. You should craft a clear and specific thesis statement about the novel, poem, or play you are evaluating. Your thesis statement should explain your stance or argument about the text.