"The real beauty of relations comes from caring and sacrificing for other's needs" Bring out the truth of this from the story "The Gift of the...

The idea shown in the quote you cite is the main idea of
this short story.  We can see it demonstrated in what Jim and Della do for one another
and how that makes them feel.

In this story, Jim and Della
end up sacrificing for one another.  Each of them gives up his or her prized possession
in order to buy something nice for the other.  Of course, by doing this they make the
things they buy useless (Jim can't use the watch chain since he pawned the watch, for
example).

Because they have done this, the things that they
have bought are worthless, right?  You would think so, but that is clearly not the
case.  After they find out what they have done, they love each other just as much
(possibly more) than they had before.  The reason for this is that they have both shown
that they care for, and will sacrifice for, the other
person.

In a relationship, you must care for the other
person and you must care for them enough to sacrifice (at times) for them.  If you do
not, your relationship will not last.