Om Mani Padme Hum
Om or Aum
Aum meaning 3, and representing body, mind, and speech. Aum represents both impure and pure body, mind and speech.
To transform impure to pure:
Mani means jewel. Jewel meaning altruism: The belief in, or practice of selfless concern for the well being of others.
Padme means wisdom.
Hum means a combination.
Combining altruism and wisdom is the way to purify body, mind, and speech.
Om Mani Padme Hum means to purify the body, mind and speech through the combination of compassion and wisdom