There are many techniques that use pure visualization - all in your mind. There are mantra (or prayer) techniques, that require repeating a certain formula, either out loud or silently (in your mind). There are devotional techniques where the practitioner is worshiping an image or a symbol of a deity (the deity itself being a metaphor of some aspect of consciousness states). There are the dancing dervishes. Goes on and on.
There are many techniques that use pure visualization - all in your mind. There are mantra (or prayer) techniques, that require repeating a certain formula, either out loud or silently (in your mind). There are devotional techniques where the practitioner is worshiping an image or a symbol of a deity (the deity itself being a metaphor of some aspect of consciousness states). There are the dancing dervishes. Goes on and on.