Hashem Wants Us to Struggle

The Chiddushei HaRim once declared, "I have the power and ability to remove the Yetzer Hora completely from all the limbs of a person, so that he will be ready to accept the yoke of Malchus Shomayim, but that is not Hashem's will. He wills instead that we have a yetzer and that we struggle with it and overcome it."