Based on an upright, open posture, chanting adds vocal tone to breathing. Breath becomes sound through bodily resonators. The release of breathing out, combined with the resonance and the reference to images of purity and compassion is brightening.
Practice with opening the body as an energetic formation. Muscles can relax on an upright posture, the boundaries of the bodies can relax. Opening into the surrounding space ventilates stale energies, supporting clearer attitudes and a brighter heart.
We are in an ever changing universe, yet conventionally don't understand this. Mindfulness brings us so much intimacy with things as they truly are that we wake up to this streaming nature. We have to let go of old habits of clinging to align with the stream we are in.