Along the way, Walton and his crew discover an emaciated man on a sledge and decide to nurse him back to health. To the more sharp reader or analyst, one can skillfully predict that this is Doctor Frankenstein himself, bringing words of warning to the ambitious Walton. He tells him "You seek for knowledge and wisdom, as I once did; and I ardently hope that the gratification of your wishes may not be a serpent to sting you, as mine has been." Besides being an evident biblical reference, this particular quote gives a reader a glimpse into the apparent regret of the scientist in his role in the creation of the infamous Frankenstein's monster.
In this case, the serpent once again becomes a symbol for forbidden knowledge, something that both Doctor Frankenstein and Robert Walton are chasing after. The doctor's quest for the secret of life parallels to Walton's quest for the secrets of the North; both becoming paradigms of man tampering with forces way beyond their control. At least, not yet. The simple passage gives off Mary Shelley's, and other philosophers of her time, fear of the growing rate of the advancement of science and technology: the fear that what may be seen as an extraordinary benefit to mankind, may lead to their doom in the end.
-Lian C.