1900 was born on the sea, grew up on the sea and finally died on the sea. The sea is symbolic of freedom. He has no parents. Danny, who adopted him, died when he was 8. He has no friends. His only friend step off the ship to look for his happy life. He has no love. His misty love drawn to an end because his choice of not getting off. His life seemed to be empty. No position belonged to him. Nevertheless, he was able to figure out the meaning of life.
"In all that sprawling city there was everything except an end. There was no end. What I did not see was where the whole thing came to an end. The end of the world... "His saying is paralleled to the worldview of the existentialism, which claimed that life is absurd, desperate with no end.
However, he was free to make his own choice. Existentialism emphasized the human individuals and freedom. Why were 1900 unwilling to step off the ship, to come into a bigger world? On the ship, he was his god but out of it, he would lose his freedom, pulled by people, fame and wealth. He was so well aware of it that he obeyed his mind, rejecting to step off the ship for a brilliant world.