Oh, I wish that yesterday,

Yesterday was today!

Yesterday you was here.

Today you gone away

I miss you, Lulu,

I miss you so bad—

There ain’t no way for me

To get you out of my head.

Yesterday I was happy

I thought you was happy, too.

I don’t know how you feel today—

But, baby, I feel blue.

Langston Hughes

Os poemas são tradicionais formas artísticas de autoexpressão. No verso “But, baby, I feel blue.”, o termo blue é usado para expressar um sentimento de