I need as many quotes as possible that show/refer to the "dangerous/forbidden knowledge" in Frankenstein.

From an
early age, is attracted by the allure not of science but of alchemy, with its forbidden fruits
and promises or dreams of omnipotence. For instance, when he arrives at his university, he is
disappointed that his researches into alchemy are pooh-poohed, stating:

I had a contempt for the uses of modern natural philosophy. It was
very different when the masters of the science sought immortality and power; such views,
although futile, were grand ...

He wants not science but
grandeur and glory, by whatever means it takes.

Earlier, when Victor is
disgusted by a natural scientist...