In astrology, the Moon and Jupiter are associated with mental stability. The Moon is associated with emotions, while Jupiter is associated with wisdom and spirituality. Some common astrological remedies for mental peace include wearing a pearl associated with the Moon, or a Yellow Sapphire, associated with Jupiter. Chanting mantras, such as the Gayatri mantra or the Mahamrityunjaya mantra, can also help to calm the mind and promote mental peace.