3. They write because of the development of the inner hearing. Their work is largely stenographic, yet is also partially dependent upon their standard of development and their education. A certain definite unfoldment of the centers, coupled with karmic availability, constitutes the basis of choice by the teacher on the subtler planes who seeks to impart a definite instruction and a specialized line of thought. The responsibility as to accuracy is therefore divided between the one who imparts the teaching and the transmitting agent. The physical plane agent must be carefully chosen and the accuracy of the imparted information, as expressed on the physical plane, will depend upon his willingness to be used, his positive mental polarization, and his freedom from astralism. To this must be added the fact that the better educated a man may be, the wider his range of knowledge and scope of world interests, the easier it will be for the teacher on the inner side to render, through his agency, the knowledge to be imparted. Frequently the dictated data may be entirely foreign to the receiver. He must have a certain amount, therefore, of education, and be himself a profound seeker of truth before he will be chosen to be the recipient of teachings that are intended for the general public or for esoteric use. Above everything else, he must have learnt through meditation to focus himself on the mental plane. Similarity of vibration and of interests hold the clue to the choice of a transmitter. [179] Note that I say; similarity of vibration and of interests and not equality of vibration and of interests.