that is true, i read there was a cripled practioner that was wheel chair bound and couldn't cast the circle, invokation of the towers or spirits of east,west,north south..etc etc..
so the practioner did the whole magickal rite in his mind, imagining the room with altar, incense, candles, everything needed to do his work
and the workings manifested successfully..
thats why i do everything in the astral realm, because i dont have a big room for rituals and if the GODS AND THE GODDESSES wanted a full rite dedicated to them they would of got me a big house to the full rites...
I seen pictures pagan soldiers in irag war ,doing a rite on the desert
doing a pagan rite with what he had his will and faith..