Does "A Clean Well-Lighted Place " by Hemingway contain any symbols?

In Hemingway's
short story of endurance and ethical conduct in the face of the meaninglessness of life, there
are three symbols, the light, the use of repetition, and the
nada.

THE LIGHT

A widower, the lonely
old man, who has before attempted suicide, lingers in the cafe because he wants to drink where
there is light.  While the young waiter is irritated with the old man, wishing he would leave,
the older waiter understands that the man's endurance of the meaningless of life can better be
made in the light.  He compliments the old man saying,

"He drinks without spilling Even now, drunk.  Look at him."

The old man has discipline, but his despair is so great that
darkness exacerbates his condition. In the light there is some hope, some order to things to
which the man's desperate spirit can cling as life then is predictable.  But, in the darkness he
feels only the nothingness of his life.

THE NADA

The
Spanish word for nothing, nada represents the
absurbity and meaninglessness of life.  This existential concept defines the emptiness, or void,
that many have felt in their souls after returning from the world wars.  Nothing really matters
in life; all that one can do is create his own existence and give some meaning to his life by
maintaining a stoic order.  Otherwise, the nada will conquer the
man.

When the older waiter goes to bed, he hopes that the daylight will give
some meaning to his life and he can go to sleep because he feels, too, that all is a nothing and
man, too, is nothing.

REPETITION

Hemingway's use of
repetitive phrasing, such as beginning so many sentences with "The old man..." and 
phrases with nada and their imitation of the Lord's Prayer
all suggest aesthetic appreciation along with the need for order if one is to survive
the absurdity of life.