A mantra repeated continuously replaces your constant negative thoughts; thoughts of worry, fear, discontentment, depression, etc. brings about healing to your body-mind system. Admittedly it is not a quick fix but worth the effort to bring a gradual change in your mental setup leading to permanent peace and bliss.
Not only permanent but unshakable peace and bliss undisturbed by inner and outer influences.
With a little bit of awareness you will be able to shift your ‘usual’ mindset to a blissful one. What joy there is once you realize what dormant potential lies right within yourself and how simple it is to be blissful more and more often creating new brain grooves of bliss. And it will spread and deepen those bliss grooves the more you become aware and practice the shift.
Can you imagine that perhaps one day you don’t have to shift anymore, that the bliss will simply stay 24/7?
Paramahamsa Nithyananda says about Sanskrit, the ancient language used for mantras, that the very vibration of Sanskrit words can transform your mood, the very sound will change your mood. It does not matter whether you understand Sanskrit, the very sound energy of Sanskrit purifies your body, your whole being.