Heart of Darkness-opinion

Although HEART OF DARKNESS is not my taste of books, I really enjoyed the way Conrad depicted the inner evil that exists within all of us. The idea that if any of us are challenged with the conditions that Kurtz had to endure, would we be any different in our thinking and convictions.
In class we discussed sanity and the lack thereof, and whether or not Kurtz was sane because he fully believed in what he was doing, but then again, don't all crazy people believe that what they are doing makes sense and is just with their reasoning for their actions? Kurtz, in my opinion, was insane and he believed in his methods because he was crazy, and he was able to rationalize his absurdness because of his vast intelligence. Kurtz was incredibly interesting and he made the book more intriguing because you could not understand how a man with so much knowledge and talent was able to cross over to such a dark and menacing way of thinking. It reminded me of LORD OF THE FLIES because the boys changed with their environment, but perhaps they were just reverting back to their primal and instinctive evil, the same evil Kurtz embodied.
Marlow was also captivated by Kurtz, just like the countless other men Kurtz encountered. Marlow too is tested by Kurtz's evil, however, he is able to overcome such a temptation. Conrad was portraying how easy it is to be sucked into the inner evil and darkness of the soul, but it takes a strong and determined person to recognize such a flaw and bypass the appeal and see it for what it truly is, and that is evil. And in the end, the evil will win and overtake every essence of your body, thus Kurtz's last cry of "The Horror! The Horror!"