Mantra yoga is the time tested surest way to divinize body and mind. You can chant any mantra that appeals to your heart though Guru mantra is most effective as it comes with the spark of Guru’s divinity. The core is your yearning and longing for divine life. Mantra is the sound form of God. If you feel the need for true happiness then follow the path of creating a little distance from all the negative things of the world and come closer to mantra and faith in Higher Self. More you do japa with your heart and keep a vigilant eye on mind’s tendencies to cling to the transient you will see a radical change leading you toward a peaceful life and spiritual enlightenment.