Om Mani Padme Hum

Bodhisattwa Avalokiteshwara (Called Chenresig in Tibetan Buddhism):
Om Mani Padme Hum

Rough Translation: 'Om, salutations to The Jewel of Consciousness (the mind) which has reached the heart's lotus.'

This mantra is practiced more than any other in the world. It is pre-eminent in producing a state of dynamic compassion in the sayer. Dynamic means that this compassion contains as part of it the ability to powerfully manifest in both subtle and obvious ways. One of the simple yet profound teachings which accompanies this mantra is the concept that when the mind and heart become united, anything is possible. The implications of this simple thought are staggering. If you want to change the world for the better, this mantra should be in your spiritual toolbox.