The idea here is that the subtle vibrations associated with the repeated mantra can encourage positive change — maybe a boost in self-confidence or increased compassion for others — and help you enter an even deeper state of meditation.
This technique is similar to focused attention meditation, although instead of focusing on the breath to quiet the mind, you focus on a mantra (which could be a syllable, word, or phrase). The idea here is that the subtle vibrations associated with the repeated mantra can encourage positive change — maybe a boost in self-confidence or increased compassion for others — and help you enter an even deeper state of meditation.