why

I know why the caged bird sings, ah me,
When his wing is bruised and his bosom sore,--
When he beats his bars and he would be free;
It is not a carol of joy or glee,
But a prayer that he sends from his heart's deep core,
But a plea, that upward to Heaven he flings--
I know why the caged bird sings.

Paul Laurence Dunbar