In Frankenstein, what are the main points of Victor's speech just before he dies, especially his advice to Walton?

When Victor realizes that he is going to die, he summons
Walton to his bed and makes several significant points in his final speech. He tells
Walton:

1. That he has let go of his feelings of vengeance
toward the creature but he still believes that the creature needs to die so that he
cannot harm anyone else.

2. He pleads insanity--really he
does! After everything that has occurred, Victor states that he has examined his "past
conduct" and that he believes he is blameless. He chalks up his creation of the monster
to "a fit of enthusiastic madness" and then explains that his duty to his family and
friends superceded any responsibility he should have had for his own
creation.

3. He asks Walton once again, but this time out
of "reason and virtue," to destroy the monster for him. While Victor believes that it is
his duty to mankind to destroy him, he realizes that he is no longer physically capable
of doing so.

4. Victor's final words to Walton demonstrate
that he has gained some self-awareness. He advises Walton
to

"seek
happiness in tranquillity and avoid ambition, even if it be only the apparently innocent
one of distinguishing yourself in science and discoveries" (Walton's September 12th
letter to Margaret; pg. 205 in Holt Rinehart Winston edition of the
novel).

These words prove
that Victor recognizes the futility of the glory-seeking ambition of his
youth.