THERE are many people in America and Europe who want to know what yoga is, and they say, "Do not tell us about the yoga of one particular school; we want a concise survey of the whole field." This need I have tried to fill in the present small volume. In doing so I have endeavored to preserve the perfect authenticity and clearness of the original teachings of ten different well-known Oriental schools of yoga teaching and practice. This I am doing mainly direct from the original texts and with an extensive knowledge of their actual operation, acquired largely during my thirty-eight-years residence in the East. Then comes the remark: "We want to find out whether there is anything in these forms of yoga which we can use in our present civilization. Has it anything for us?" "How so?" "It will do this in four ways: "First, it will co-ordinate the contents of the mind on all aspects of the matters in which you are currently interested, and ensure that nothing is missed or overlooked. "Secondly, it will permit the rising of new ideas, through the recombinations of old ones, and suggestions arising from them. "Thirdly, it will exercise the mental faculty, and thus increase both its grip and its grasp, improving its functionality for the whole day, just as the muscular development acquired by ten minutes' exercise in the morning gives the body greater strength for the whole day. "Fourthly, it will automatically work some of the magic of the mind, whereby you will be put tele-magnetically into touch with things and persons you If this is not enough, let us add that it will open new fields of interest, especially those which are concerned with the understanding and right use of life itself. It will also enrich consciousness itself. Inasmuch as we all enjoy consciousness more than anything else it will be giving us the best of all benefits. There is a story about two men who were talking about a little boy who was licking an ice-cream cone. One remarked that the boy did not like ice-cream. The other, sensing a catch, said he supposed that what was meant by that remark was that what was liked was the taste of the ice-cream. But the reply was that what the boy really liked was only the consciousness of the taste of the ice-cream, and that applies to everything in our lives. Why should not our subjective faculties be cultivated? We take care of our horses and other animals, and give them proper food, exercise and rest. Why not do the same for our mental faculties—also for our moral and spiritual ones, too, and that not merely by the way? But to return to the material practicality of the subject. Thousands of people are breaking down in modern life because they cannot stand the pace. Suppose we can teach them how to keep up the pace of In the present world crisis most of us are concerned not so much with the idea that a bomb may fall on our own heads—we would rather it did so than on the heads of those near and dear to us, or on any considerable number of people anywhere. We are very