According to the wisdom of Kundalini Yoga, repeating a sacred mantra internally, or externally, shifts the energy in and around you. The more you repeat a sacred mantra, the stronger the vibration becomes and the more able the vibration is to activate your chakras and cleanse the mind of any negativity. As we begin to regularly practice mantra repetition, the mantras begin to vibrate at a deep energetic level.
If you are practicing the repetition of a mantra internally, you may find using a mala helpful. A mala is a string of sacred beads that helps you to keep track of how many mantra repetitions you have completed. A mala also helps to focus your mind on the mantra practice. Mantra repetition is a very effective practice for activating the chakras because of the vibratory effect of the mantras on the energy vortexes, or chakras, themselves.