Taking the esoteric Shinto based beliefs of the Founder of Aikido, Morihei Ueshiba, Saotome Sensei translates these ideas into Western terms using examples from natural science, physics, psychology, and mathematics. Not a technique book! This is the premier explanation of Aikido philosophy in terms comprehensible to the average Westerner.There are very few teachers who had more exposure to the Founder on a daily basis, training with O-Sensei for over fifteen years! If you only have one Aikido book, this should be it!