You Are the Rose I Refuse to Touch

Among all my roses, you are my one and only white rose, the only one untouched by the color of blood. You are the last pure place in my heart. But I can't stay with you anymore. Goodbye, my white rose, the rose I never wanted to stain.

Theme: The Seven Deadly Sins represent different forms of evil, but what defines evil? Is it just murder? I think it must be when people violate their own morals and principles.