I find the Moola Mantra to be extremely calming, and I love to recite it before or after some silent meditation.
ohm sachidananda parabrahma purushotthama paramathma sri bhagavathi sametha sri bhagavathe namaha.
MEANING:
ohm> this has more than 90 synonyms but here this means “welcome”
sachidananda = sath+chith+ananda
God is existing in these three states sath, chith and ; ananda. Like the water (H2O) exist as ice, water and steam at triple point( at 0.01 degree centigrade)
sath is the formless existence , chith is the physical body, ananda is the bliss or awareness.
Parabrahma> Brahma means creater (human), para means the absolute
so parabrahma means absolute creater. Actually All creation is by god, but inbetween the ‘I’ is redefining the life flowing through senses all the time .
Purushothama = purusha + uthama
Purusha means the cause, uthama is the absolute. God is the absolute cause for himself.
Paramathma> Parama + athma
Athma is the soul and Paramathma is the Supreme soul (soul behind souls).
Sri> Greatful.
Bhagavathi sametha> Bhagavathi is the feminine part (Amma), sametha means inclusive.
Bhagavathe> Masculine part (Bhagavan)
Namaha> Saluting.
All this explaination applies to Sri Ammabhagavan who always lead us as formless and physically , we pray them with moola manthra.
(via Source)

