Dear cadizmarias,
Let me answer you, better confess you, from the point of a resigned ex- BK teacher as much as I remember:
The aim of the BK Raja Yoga course is to find "heirs", who will be future kings and queens (deities) in the Golden Age after Destruction, and to find the future subjects and servants of these kings.
So during the course the BK teachers who are called "instrument teachers", which means instruments of God Shiva, observe the students carefully if they are influenced during the half hour BK meditation with special music at the beginning, if they get the drishti from the teacher (hypnotic look at the forehead of the student ), if they are influenced by the guided meditation (a sort of hypnotic suggestions) at the end of every class.
If the student is regular, comes to every class and seems to be interested, takes the drishti, gets into half trance during meditation, so at the end of the course such students are invited from the teacher to the Murli class at Thursday evenings, - the duration of the foundation course = 7 days course is according to the curriculum of different centers, once a week one month or three months. So the graduates are introduced first to the relatively meaningful parts of the Avyakt Murlis, than to some easy parts of the Sakar Murlis. If they are not shocked of the news that God is coming together with Dada Lekhraj's soul to Dadi Gulzar in Madhuban headquarters, and if they don't run away learning about the celibate lifestyle of the BKs than they are invited to the 06.00 a.m.morning Murli class.
You can find more detailed information in the previous posts of this forum and in the Encyclopedia.
Some students however are not regular and are not so much influenced but like the atmosphere of the center and like the teacher and the other smiling BKs in white and the toli ( home made and God offered sweet), but they don't find much meaning at the classes and are not interested at the BK lifestyle or Golden Age. They like to come and go. So if they are nice, don't ask disturbing questions, try their best to take drishti but don' like much to look into the eyes of the teacher long enough, try to make meditation but cannot focus (which means they don't come under the influence of the instrument teacher and don't get into half trance), so the teacher may target them as "contact souls".
Contact souls means non-Bks but useful to the BKs. Those whose money and service can be very much needed, and may allow them to come and go as they like to the introduction course and to the public events. These students are considered to be the future subjects and servants of the Golden Aged kings (deities). When they get familiar their service and contribution is asked for sweetly at every occasion.