The exact same chapter also mentions his bravery during the war and what happened to him on the 8th working day of struggle: कामिनां बहु मन्तव्यं सङ्कल्पप्रभवोदयम् Mantras and affirmations do the job equally for yourself by reinforcing particular thoughts and intentions, but mantras often have spiritual or spiritual significance, https://www.youtube.com/@Mahavidyabaglamukhi