A mantra is packed with the power of the ascetics (tapas) of the rishis to whom it was revealed. Even a person who has no earlier exposure to the Veda can feel its power when a devotee chants it in the proper mode.

Rig Veda mantras propound all the speech or all the ideas and thoughts leading to all-sided perfection; the Yajur Veda develops the mind which is the source of all actions; the Sama Veda makes us fully develop our life energies or prajna for completely developing our potential. The Atharva Veda gives the methods of perfection of our body and senses like eyes (chakshu) or hearing.