Triumph through sin is true defeat
Nahj al-Balāgha|Volume 1|Book 3|Chapter 327
۳۲۷. وَقَالَ (عليه السلام): مَا ظَفِرَ مَنْ ظَفِرَ الْإِثْمُ بِهِ، وَالْغَالِبُ بِالشَّرِّ مَغْلُوبٌ.
327. Amīr al-mu’minīn, peace be upon him, said: He whom sin overpowers is not victorious, and he who secures victory by evil is (in fact) vanquished.