SYMBOLISM IN FRANKENSTEIN

Some of the main important symbols that you can find in this incredible story are:

EXPLORATION

The entire story of exploration for knowledge, as symbolized by Captain Walton's quest for the "perpetual splendor" of the North Pole (Letter 1.2), becomes a cautionary tale and allegory about the dangers of boundless science. His physical journey and Frankenstein's intellectual quest become a warning against the scientific revolution and its potential for destroying humanity.

Or maybe not. You could definitely argue that the problem isn't the journey itself; it's how we get there, and who's leading us. After all, the monster is harmless until Victor's shameless neglect drives him to murder. And the journey to the North Pole may not have happened this time; but who's to say it might not? Walton shows that he's learned his lesson by turning back—but we don't know that he isn't going to set out again

Warning to the readers to understood that knowing a lot is also dangerous and it can become against us

THE SUBLIME

The Romantic movement is that it was all about the sublime. The Sublime is a literary and philosophical concept that referred to the feeling we get when we encountering something in nature that's a mixture of terror and beauty, like a thunderstorm or a giant waterfall or a massive glacier.

We can't tell you exactly what the Sublime symbolizes in the text, because it's more of a pattern of imagery than a clear symbol. On the one hand, it's an impetus for Victor's discovery—seeing lightning destroy a tree makes him want to study electricity. It also offers him some comfort, thinking that nature is mourning his little brother. At the same time, it's associated with the monster itself—check out how, in the passage above, he appears right when Victor is feeling the most in tune with the thunderstorm.

EQUALITY

Anther Symbol that is very interesting is the analogy between te monster and women in those days, Equality was not very common i those years and in this video you can understand bette this symbolism.

https://www.youtube.com/watch?v=Sw1_CMDcjgA