If we are willing to believe in this mastery over the body, we must be prepared to believe in the mastery over our own inner thoughts and feelings. That a man should be a prey to any thought that chances to take possession of his mind is commonly among us assumed as unavoidable. It may be a matter of regret that he should be kept awake all night from anxiety as to the issue of a lawsuit on the morrow, but that he should have the power of determining whether he should be kept awake or not seems an extravagant demand. The image of an impending calamity is no doubt odious, but its very odiousness (we say) makes it haunt the mind all the more pertinaciously and it is useless to expel it.
Yet this is an absurd notion--for man, the heir of all the ages to be hag-ridden by the flimsy creatures of his own brain. If a pebble in our boots torments us, we expel it. We take off the boot and shake it out. And once the matter is fairly understood it is just as easy to expel an intruding and obnoxious thought from the mind. About this there ought to be no mistake, no two opinions. The thing is obvious, clear and unmistakable. It should be as easy to expel an obnoxious thought from the mind as it is to shake a stone out of your shoe; and till a man can do that it is just nonsense to talk about his ascendancy over Nature, and all the rest of it. He is a mere slave, and prey to the bat-winged phantoms that flit through the corridors of his own brain. Yet the weary and careworn faces that we meet by thousands, even among the affluent classes of civilization, testify only too clearly how seldom this mastery is obtained. How rare indeed to meet a man. How common rather to discover a creature hounded on by tyrant thoughts (or cares or desires), cowering, wincing under the lash--or perchance priding himself to run merrily in obedience to a driver that rattles the reins and persuades him that he is free--whom we cannot converse with in a careless tete-a-tete because that alien presence is always there, on the watch.
It is one of the most promising doctrines of certain schools of occult philosophy that the power of expelling thoughts, or if need be, killing them dead on the spot, must be attained. Naturally the art requires practice, but like other arts, when once acquired there is no mystery or difficulty about it. And it is worth practice. It may indeed fairly be said that life only begins when this art has been acquired. For obviously when, instead of being ruled by individual thoughts, the whole flock of them in their immense multitude and variety and capacity is ours to direct and dispatch and employ where we list, life becomes a thing so vast and grand compared with what it was before, that its former condition may well appear almost antenatal. If you can kill a thought, for the time being, you can do anything with it that you please. And therefore it is that this power is so valuable. And it not only frees a man from mental torment (which is nine-tenths at least of the torments of life), but it gives to him a concentrated power of handling mental work absolutely unknown to him before. The two things are correlative to each other.
While at work your thought is to be actually concentrated in it, undistracted by anything whatever irrelevant to the matter in hand--pounding away like a great engine, with giant power and perfect economy--no wear and tear of friction, or dislocation of parts owing to the working of different forces at the same time. Then when the work is finished, if there is no more occasion for the use of the machine, it must stop absolutely--stop entirely--no worrying (as if a parcel of boys were allowed to play their devilments with a locomotive as soon as it was in the shed)--and the man must retire into that region of his consciousness where his true self dwells. I say that the power of the thought-machine itself is enormously increased by this faculty of letting it alone on the one hand, and of using it singly and with concentration on the other. It becomes a true tool, which a master-workman lays down when done with, but which only a bungler carries about with him all the time to show that he is the possessor of it.
(Unknown author)