On the spiritual path the preparation that is most necessary is to make a location for the knowledge of God, God in one's own heart. If you ask me what I mean by location, the answer is that in the ear, for instance, there is a location for sound that comes from outside. The reason is in the ear there is the space for accommodation, not only for sound, but for every letter and syllable. If it were not for the location that man has in his ear he could not hear, and so location must be created in one's own heart. This construction of the ear is a perfect picture of the location that is in the heart. Outside, the ear is hollow. Its shape is its receptacle, and this is produced by response. The tendency is to take in all that comes. It seems as if some part of the ear has been cut out in order to make a hollow.