Read "The Debt” by Paul Laurence Dunbar.

This is the debt I pay
Just for one riotous day,
Years of regret and grief,
Sorrow without relief.

Pay it I will to the end —
Until the grave, my friend,
Gives me a true release —
Gives me the clasp of peace.

Slight was the thing I bought,
Small was the debt I thought,
Poor was the loan at best —
God! but the interest!

What does the stress on the words at the beginning and end of lines 9 and 10 help show about the speaker?

He purchased something without knowing how much it would cost.
He thought for a while before purchasing the small thing he wanted.
He did not know that he would eventually have to pay back the loan.
He did not realize that a thing so small could affect his life so greatly.