Explain the following comment from "A Clean Well Lighted Place":"He did not wish to be unjust. He was only in a hurry."

In Ernest Hemingway's "A Clean, Well-Lighted Place," the
young waiter at the cafe where the solitary old man drinks is in a hurry to have this
cafe close so that he can go home.  Therefore, he tells the other waiter, the "unhurried
waiter," that the old man can buy a bottle and drink at home.  But, when the older,
unhurried waiter remarks, "It is not the same," it is then that the younger one realizes
the callousness of his words,

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"No, it is not," agree the waiter with a wife. He
did not wish to be unjust.  He was only in a
hurry.

Significantly,
Hemingway establishes the contrast between youth and age.  The young waiter has
"confidence" in his life.  With a wife at home, he is not alone; occupied, he is not yet
aware of the darkness that creeps into one's life later on.  For, he has a routine and
another person who makes his life predictable, giving it the appearance of meaning. 
However, the older waiter understands that there is
nothing--nada--and man's existence is essentially meaningless.  It
is only the light and "a certain cleanness and order" that provide any order or
meaning to life. 

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"We are of two different kinds," the older waiter
tells the young waiter. Each night I am reluctant to close up because there may be some
one who needs the cafe."

The
older waiter understands why the old man wishes to linger.  In fact, he, too, is
reluctant to return home where he lies awake in bed until daylight when he is able to
then fall asleep.