The Dark Side Will Make You Forget

"Sasha was a piece of **** before the blast, but looking at her now, is this what my powers are going to do to me? A warped body and twisted mind... is that my future?"

- Cole pondered whether he would turned evil due to his powers after seeing how terrible Sasha has become.

The Dark Side Will Make You Forget is TV Tropes-popularized term about warning where turning to the dark side, either by one's own choice or corruption from outside force is not something to be underestimated as it would made one would forgot his/her true self.

A hero or other good guy may had to take a morally grey action (which decision deemed to be neither bad nor good) to solve his/her problems at hand. But he/she must aware with the fact that such actions must be taken wisely as there are chances where he/she unknowingly turned to the dark side and slowly become an evil person without him/herself realizing it until its too late, as become an evil person is more easier than prove oneself to be a truly good one. Worse, had he/she went far enough (far enough that they may have his/her first MEH crossing record), he/she eventually embrace the path of villainy.

A character who turned to the dark side due to ignore this warning may sympathetic, but it does because they were used to be victim of corruption that pushed them to the dark side in the first place or worse, being the weak-willed individuals whom very vulnerable with corruption even from something that not affect their sanity like gained better equipment/higher status. At the beginning, he/she may have good reason to commit morally grey actions that would affect their morality, but he/she progressively become worse and worse as the time passes and ultimately forgot their original goals and dreams. Those whom still have redeemable qualities can be stopped before becoming full-blown irredeemable villain through their own conscience or through reasoning with his/her allies/loved ones/families, though they may still follow the dark path or chooses to turned around.

'''NOTE: The examples below MUST be involving about characters who slowly turned to the dark side due to frequently follow the darker path/choices in their life that made them more and more villainous as the time passes, not simply become evil in an instant (example such Ron Stoppable turned into Zorpox the Conqueror and Bloom's brainwashing into Dark Bloom is less relevant due to how they become evil was extremely instant instead of through several stages of villainy). It means those whom become evil in this way would go through several stages of path of villainy from either:'''


 * Choosing bad/selfish choices: The hero/heroine was given clear choice over the course of his/her life, but he/she tend to choose the negative ones (either in form of taking selfish choice or sought the assistance from villains) that worsened their reputation over time and unaware that he/she slowly become as worse as those whom he/she hate. Example: Cole MacGrath slowly become evil and ruthless due to choosing more selfish choice in spite of also having the chance to choose the more heroic choices but that ws depend on the player.


 * Willing to follow/succumb to evil influence: The hero/heroine fully aware with the risk of malevolent corruption that would made him/her evil, but out of pure spite, allowed him/herself to become corrupted anyway against the other's wishes. Example: Nimue, out of pure spite and rage over death of her family, killed Vortigern against Merlin's warning that in doing so would made her magic become dark, resulting her corruption and transformation into Dark One.


 * Lack of strong will to overcome corruption from power/influence they vulnerable with: The hero/heroine was put into situation where his/her psyche wrestles with malevolent force that threatened him/her to turned evil, be it either a villain's brainwashing (often through dark magic) or certain hazardous substance that corrupt both mind and body which either supernatural or scientific in nature or both. But to make the situation relevant for this article, the hero/heroine's strong will to overcome the corruption that threatened to turned him/her evil should he/she succumbed to it would be tested: The hero/heroine would try his/her best to resist the corruption for a long time, but because he/she failed to rid the corruption before it's too late, he/she eventually become evil that had neither his/her friends succeed to reach for him/her, they had to put her out of her misery. The example would be Garmadon, whom eventually succumbed to corruption from Great Devourer's venom after keep it at bay for a long time, and eventually able to redeemed himself once the corruption cured through exorcism by his son Lloyd.

Quotes
"Terenas: Ah, my son. Arthas: You no longer have to sacrifice for your people. You no longer have to bear the weight of your crown. I've taken care of everything. (Arthas coming to Terenas) Terenas: What is this? What are you doing, my son? Arthas: Succeeding you, father..."

- Arthas Menethil revealed to have succumbed to Frostmourne's malevolent curse, with end result becoming a evil, malevolent, cold and ruthless death knight.

"Toa Gali: Brother Toa Tahu: Fire has no brothers. FIRE CONSUMES ALL!"

- Toa Tahu to Toa Gali after corrupted by the Rahkshi of Anger.

"Toa Gali: Brother, remember who you are, remember you destiny. Toa Tahu: I have no desting!"

- Toa Gali trying to remind Toa Tahu who he really is, but refuse to believe.

"It's bad to kill. Guns kill. And you don't have to be a gun. You are what you choose to be. You choose. Choose."

- Hogarth trying to remind the Iron Giant that he is good.