Please help me with the theme and analysis of different key lines from The Man of Destiny by Geroge Bernard Shaw.

The central theme of Shaw's
play, The Man of Destiny, is illustrated in the title: destiny
hinges upon single remarks and occurrences that turn of the tides of life. Shaw
illustrates this theme in the dual of wills between General Bonaparte and the Lady over
who will possess the mail dispatched to Bonaparte and, more importantly, who will
possess knowledge of the contents of one particular letter. The Lady, while in disguise,
stole Bonaparte's mail while it was en route to him in order to liberate a letter
written by Josephine to her paramour Director Barras, which was maliciously forwarded to
Bonaparte with evil intent toward Josephine. In this willful dual, Shaw illustrates that
Bonaparte has several chances to change the course of his destiny by how he does or does
not react to the situation and to the words the Lady speaks. A pivotal example of this
is when she, almost overpowered by Bonaparte's efforts to keep control of his newly
gained mail, says:

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LADY (springing up with a bright flush in her
cheeks). Oh, you are too bad. Keep your letters. Read the story of your own dishonor in
them; and much good may they do you. Good-bye. (She goes indignantly towards the inner
door.)

This
line, and one that precedes it in the play, are two pivotal
lines as they clearly open Bonaparte's choices to him and open his destiny to change of
course. The other line, also spoken by the unnamed Lady,
is:

LADY.
Nothing— (He interrupts her with an exclamation of satisfaction. She proceeds quietly)
except that you will cut a very foolish figure in the eyes of
France.

In the midst of their
dual of wills, sometimes slightly physical but mostly a dual of wits, in this second
line the Lady speaks directly to the center of Bonaparte's
inner motivation, which is his ambitions for his future position in the "eyes of
France.” This ambition is alluded to by Giuseppe, the inn keeper, in a
line in the first scene: “GIUSEPPE: I shall enjoy looking
on at you whilst you become Emperor of Europe,.” The Lady’s "quietly" delivered warning
and remonstrance makes Bonaparte take notice because he realizes that if he cuts "a very
foolish figure" at this early stage of his career, he will inevitably fail in his
ambitions to rise in power.

Later in the play, Bonaparte
has gained possession of the letters; the focus of the dual of wills shifts to
preventing him from keeping and reading the one particular letter written by Josephine.
When Bonaparte has almost won, the Lady reacts in fiery indignation and is on the verge
of storming out when she sends another verbal arrow zinging to Bonaparte's ambition. She
says: "Read the story of your own dishonor in them." Dishonor is quite a bit worse than
cutting "a foolish figure." If cutting a foolish figure could hinder Bonaparte's
ambitions, then dishonor could do much, much worse things to his career and
ambitions.
Three final things are of particular interest. Firstly, Giuseppi
foreshadows the challenges between Bonaparte and the Lady in the opening scene in the
line:

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GIUSEPPE. We are all cheerfully at your
excellency's disposal, except the lady. I cannot answer for her; but no lady could
resist you,
General.

Secondly, the Lady
presents moments to Bonaparte during which his choices might change his destiny.
Thirdly, the interesting situational irony of the play is that, while the Lady's effort
is to save Josephine's destiny, the effort presents Bonaparte's own destiny into his
hands to preserve or alter.