Valmiki Ramayana Aranya Kanda Sarga 62 Shloka 12

लोकः the world, माम् me, निर्वीर्यः without valour, इति so also, निर्दयश्चेति a man who lack compassion, वक्ष्यति will say, सीतापनयनेन by Sita's abduction, मे my, कातरत्वम् timid nature, प्रकाशं हि will manifest.

By Sita's abduction it will be clear to the world that I lack manliness and compassion. My cowardly nature will clearly manifest.