Abu Sa'id Al-Khudri (May Allah be pleased with him) reported: Messenger of Allah ﷺ said, "Whoever amongst you sees an evil, he must change it with his hand; if he is unable to do so, then with his tongue; and if he is unable to do so, then with his heart; and that is the weakest form of Faith". Muslim.
This hadith also reminds us of the power of faith in our hearts; even when we cannot take physical or verbal action against something wrong, having faith can still make a difference. We must never give up hope that good will prevail over evil in the end, no matter how dark things may seem at times.