In Shakespeare's As You Like It Act I scene iii, how does Celia respond to the difficulties in life?

In Shakespeare's play, As You Like
It, Celia approaches life's difficulties much the way a warrior approaches
his enemy: she meets them head on, with the intent that these problems will not get the
best of her. We can easily assume that there are two reasons for this attitude: first,
Celia may naturally be prone to standing up to the world; second, we should not overlook
the fact that Celia's father is a very powerful man, and she has little to fear in life.
On the other hand, Rosalind's father has been banished (by his own brother, Duke
Frederick, who has usurped Duke Senior's position), and Rosalind's security rests in the
capricious hands of Duke Frederick, who we learn is an evil man who has only kept his
niece, Rosalind, in his house because of his daughter's attachment to her
cousin.

We have already seen in Act One, scene two, that
Rosalind is well-aware of her position when she gives her necklace to Orlando. She has
little in the way of worldly goods, but shares what she has with him, leaving him
speechless. Again, at the beginning of scene three, the conversation between Celia and
Rosalind addresses Rosalind's worries over her father's banishment. Rosalind is not sure
how to brush aside the calamity that the world delivers (described as thorny "briers"
and "burs"). Celia declares that when we "take the road less traveled," we are bound to
confront difficulties.

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CELIA.

They
are but burs, cousin, thrown upon thee in holiday

foolery;
if we walk not in the trodden paths, our very

petticoats
will catch them. (lines
10-12)

We learn, also, that
part of Rosalind's growing devotion to Orlando is born of her father's devotion to
Orlando's deceased father (Sir Rowland de Boys—who Frederick hated), who
Rosalind's father held in high esteem. Rosalind's character is
gentler than Celia's…Celia is truly a fighter.

By the end
of this scene, we witness Duke Frederick's casual change in attitude when he banishes
Rosalind from his land, claiming that she is a traitor—with threat of death if she is
found defying his decision. Now, however, we see how truly committed Celia is—not just
in word, but also in deed: she stands up to her father and announces that if Rosalind is
banished, Celia will leave as well.

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CELIA.

Pronounce
that sentence, then, on me, my liege:

I cannot live out of
her company. (79-80)