Which theme is clearly evident in these lines from the passage?
why, sir, i've been so hungry that i have been glad to take the bones they threw to their dogs; and yet, when i was a little fellow, and laid awake whole nights and cried, it wasn't the hunger, it wasn't the whipping, i cried for. no, sir, it was for my mother and my sisters,—it was because i hadn't a friend to love me on earth.
gratitude
piety
liberation
suffering