@pkalmik the Poem above "Don't Quit" is plagiarized!. You obviously didn't mean to, i think, so i advice you edit and acknowledge its author.

I also notice you omitted some lines from the original poem,

Often the struggler has given up,
When he might captured the victor's cup.
And he learned too late, when the night slipped down,
How close he was to the golden crown,

Again, you need to acknowledge doing so. Otherwise, acknowledge or not, modifying it by removing some lines from the original is unethical. You could have just kept the whole piece then acknowledged the author, in case you needed to use the poem as a preamble to your own thoughts.