1. How did Jesus win? He didn't fall for the temptations as most other mortals would. Satan had no power of Him.
2. We know Jesus had power over possession demons as evidenced by His encounter with "Legion" and cast out the demons.
3. Think of how many "Big Name" evangelists weren't immune to temptation.
4. The average individual lacks the power of will to withstand a full press of even a minor demon, no less a major demon. Once a dark presence is felt, clergy should be notified.
5. Mental illness could be a cause but it shouldn't dismiss the possibility of dark presence.
6. Blaming tarot cards, Ouija boards or the similar is like blaming the victim for being raped. Humans by their nature are curious and seek answers. As you have a Guardian Angel, there are a host of evil creatures assigned to destroy the relationship between God and man.
Knowledge may be power in overcoming small temptation, which lead to greater temptation but a man is not match for the overwhelming power of Darkness. Get thee a man of the cloth! A tangential point, Satan and Lucifer aren't interchangeable but are two separate being each with a reason for cast out. Satan for not wanting to serve man. Lucifer for thinking himself to be equal to God.