From personal experience, chanting can have a very positive, uplifting effect on you, irrespective of your religious beliefs. It allows the mind to be free of any other thoughts that may be distracting or disturbing you. Chanting with others can also bring about a feeling of belonging and energy is shared. When we chant, it is said that we cut through the mind mesh and obtain freedom from delusion.
I have included some quotes below which I like a lot and which can be interpreted in many ways. I find them very useful for quietening the mind and feeling good about oneself.
Here are a couple of Kirtan chants:
“Chanting is the heart practice of yoga. When we are in love, our hearts are constantly calling out the name of our lover. Chanting is that calling”.
I am that (that which is immortal and everlasting) - The Upanishads
“Om asato ma sad-gamaya, tamaso majyotir gamaya,
Mrtyor ma amritham gamaya,
om shantih shantih shantih.”
Lead me from the unreal to the real, from darkness to light, from death to immortality, om peace peace peace
“Rama bolo Rama bolo, bolo, bolo, Ram
Seeta bolo Seeta bolo bolo bolo Ram
Hanuman bolo Hanuman bolo bolo bolo Ram”.
Rejoice and sing the names of Ram, Sita, and Hanuman.
“Ganesha sharanam, sharanam Ganesha Jai Jai Ganesha”
I take refuge in the one who removes all obstacles