" Even assuming that a mantra's shabdic ["sacred sound"] quality is an important component of its effectiveness, that quality can come into play only when the mantra is uttered by one properly instructed in the art of yogic visualization; for mantras have not only sound, but also form and color; the form or the archetypal image or symbol with which it is associated must be evoked at the moment of utterance, since that image is the repository of all the psychic, emotional and spiritual energy drawn from all the adepts who have ever concentrated upon that particular image or symbol since it first came into being. (That the energy generated by a succession of yogins throughout the centuries is present in such symbols is a concept that will not surprise those acquainted with C.G. Jung's teaching about archetypes.) […T]he lamas teach that the mantra appropriate to each of the divine forms contemplated embodies the psychic energy of that 'being'. In other words, the yogically visualized image of the deity or the mantric syllable that symbolizes it is a centre for the powerful through-associations built around it by countless yogins during past centuries and by the adept himself in his meditations; however, it also constitutes a particular embodiment of the energies streaming from the Source and it is to this aspect that the shabdic quality of the appropriate mantra probably pertains. As the sound is no more than a symbol of the mantra's latent power, mispronunciation of the syllables is no grave matter; for it is the adept's intention that unlocks the powers of his mind. Though the mantra may consist of syllables to which no conceptual meaning is attached, pronouncing them nevertheless enables him to conjure up instantly in his mind the psychic qualities he has learnt to associate with them. "

― , Mantras: Sacred Words of Power