There's Still GOOD Inside of him, I Know

Before he call himself Darth Vader, he was the great Jedi Master, loyal and kind for his old master Obi Wan Kenobi, his kindness made his wife have a peacefully lives. But, when the darkness approach him, he's more different than anyone knows him before, stand aside with the darkside bring his wife to the death. He feels depressed, lost, sitting down with the pain and suffer.