A PROBATIONER'S THREE OBJECTS.
During the period wherein a man is under probation, he is supposed to be developing three things:—
1. The ability to contact his group, or in other words, to be sensible of the vibration of the group of which some particular Master is the focal point. He contacts it at times and at rare intervals at first. During the early part of his probation, whilst he is under observation, he can only sense and hold the group vibration (which is the Master's vibration) for a very brief interval. He will at some high moment link up with the Master and with the group, and his whole being will be flooded with that high vibration, and surge upward in an outburst of his group colour. Then he will relax, drop back and lose the contact. His bodies are not refined enough and his vibration is too unstable to hold it long.
But, as time progresses (longer or shorter according to the earnestness of the pupil) the frequency of the times of contact increases; he can hold the vibration somewhat longer, and does not relax back to normal with so much ease. Then the time comes when he can be trusted to hold the contact fairly stably. He passes then to the second stage. 
2. The second thing he is supposed to be developing on the probationary path is the faculty of abstract thought, or the power to link up with the higher mind, via the causal body. He must learn to contact the lower mind simply as an instrument whereby he can reach the higher, and thus transcend it, until he becomes polarised in the causal body. Then, through the medium of the causal body, he links up with the abstract levels. Until he can do this he cannot really contact the Master, for, as you have been told, the pupil has to raise himself from his world (the lower) into Their world (the higher).
Now both these things—the power to touch the Master and the Master's group, and the power to polarise himself in the causal body and touch the abstract levels—are definitely the result of meditation, and the earlier letters you have received from me will have made this clear. There is therefore no need to recapitulate the earlier imparted data, save to point out that by strenuous meditation, and the faculty of one-pointed application to the duty in hand (which is after all the fruit of meditation worked out in daily living) will come the increased faculty to hold steadily the higher vibration. Again and again would I reiterate the apparently simple truth, that only similarity of vibration will draw a man to the higher group to which he may belong, to the Master Who represents to him the Lord of His Ray, to the World Teacher Who administers to him the mysteries, to the One Initiator Who effects the final liberation, and to the centre within the Heavenly Man in Whose Body he finds a place. It is the working out of the Law of Attraction and Repulsion on all the planes that gathers the life divine out of the mineral kingdom, out of the vegetable and animal kingdoms, that draws the latent Deity from out of the limitations of the human kingdom, and affiliates the man  with his divine group. The same law effects his liberation from subtler forms that likewise bind, and blends him back into his animating source, the Lord of the Ray in Whose Body his Monad may be found. Therefore the work of the probationer is to attune his vibration to that of his Master, to purify his three lower bodies so that they form no hindrance to that contact, and so to dominate his lower mind that it is no longer a barrier to the down flow of light from the threefold Spirit. Thus he is permitted to touch that Triad and the group on the sub-plane of the higher mental to which he—by right and karma—-belongs. All this is brought about by meditation, and there is no other means for achieving these aims.
3. The third thing the probationer has to do is to equip himself emotionally and mentally, and to realise and prove that he has somewhat to impart to the group with which he is esoterically affiliated. Think upon this: too much emphasis is laid at times upon that which the pupil will get when he becomes an accepted disciple or probationer. I tell you here, in all earnestness, that he will not take these desired steps until he has somewhat to give, and something to add that will increase the beauty of the group, that will add to the available equipment that the Master seeks for the helping of the race, and that will increase the richness of the group colouring. This can be brought about in two ways that mutually interact:—
a. By the definite equipping, through study and application, of the content of the emotional and mental bodies.
b. By the utilisation of that equipment in service to the race on the physical plane, thereby demonstrating to the eyes of the watching Hierarchy that the pupil has somewhat to give. He must show that his one desire is