Mystics and those who aspire to a spiritual life need somewhere to be alone and to recollect themselves. it is, obviously, better to do this in solitude, in a room where you are not likely to be disturbed.

This is why I strongly recommend that, if at all possible, you set aside a small space in your home, a space that is sacred, where people cannot come and go as they please. Even if it is no bigger than a telephone booth, the important thing is for it to be set apart and consecrated so that the vibrations and subtle fluids permeating it make it easier for you to communicate with celestial entities.

Now, I must make it clear that this little sanctuary I was speaking about, the space in your house that I suggest you set aside and purify as an abode for the Deity, is simply a materialization on the physical plane of that other, invisible place that Jesus spoke of when he said, ‘Whenever you pray, go into your room and shut the door and pray to your Father who is in secret.’ this secret place is a state of consciousness, a state of self-abnegation, kindness, sacrifice and love, and when one reaches this state, one can reach the lord who is peace, light and life.

It is not enough to set aside a place in your house for the lord. if you really and truly want him to visit you, you must consecrate a place in your heart and soul, saying, ‘this place is for the lord or for the divine Mother, for Christ, for Archangel Michael…’ Believe me, if you set aside a place for these glorious entities, they will come to it.”

Omraam Mikhael Aivanhov – ‘The Fruits of the Tree of Life’, Vol. 32
http://www.prosveta.com/api/flipping/C0032AN
Building the inner sanctuary, Chap. 25