To invoke the Buddha's name you have to understand the dharma of invoking. If it's not present in your mind, your mouth chants an empty name. As long as you're troubled by the three poisons or by thoughts of yourself, your deluded mind will keep you form seeing the Buddha and you'll only waste your effort. Chanting and invoking are worlds apart. Chanting is done with the mouth. Invoking is done with the mind. And because invoking comes from the mind, it's called the door to awareness. Chanting is centered in the mouth and appears as sound. If you cling to appearances while searching for meaning, you won't find a thing. . . .
Bodhidharma
(c. 440 AD - 528 AD)
Source: The Zen Teaching of Bodhidharma, p. 111
