Why does the struggle with the yetzer hara continue even after a person has already chosen what is right?

This source-based Hagut Yosef essay explores the question: Why does the struggle with the yetzer hara continue even after a person has already chosen what is right? The canonical Hebrew article develops the theme through Torah sources and reflection on human life. This localized discovery layer preserves the source’s meaning and identity and does not add new halakhic, historical, psychological, medical, legal, political, scientific, or empirical claims beyond the Hebrew source.