The man in this sculpture is trying to become the man he is wishing to be, working hard and hammering away at the stone he is trapped in, but he is not free of it yet. He is progressing and forging himself in different stages, so he is continuously working on himself through the hammer and the chisel, deciding who he wants to become.
This notion of self-realization connects to Walter Lee Younger, who is metaphorically trapped in stone, too, mostly because of his standing in society as an African-American man. Walter is dissatisfied with the current state of his life, constantly frustrated at no one listening to him and his dreams (“Man say to his woman: I got me a dream. His woman say: Eat your eggs. Man say: I got to take a hold of this here world, baby! And a woman will say: Eat your eggs and go to work. Man say: I got to change my life, I’m choking to death, baby! And his woman say — Your eggs is getting cold!”, R: 33/34) and he