Like all martial arts, the art of Karate is to be used only in self-defense, and never to harm others or to boast. Karate begins and ends with respect, while giving the karateka the power to defend him- or herself. Aikido has its roots in a samurai practice developed in Japan in the ninth century. O Sensei was an extremely gifted martial artist, who was widely acclaimed for his mastery of the sword, staff, spear, and his skill in the art of Ju-jitsu. Eventually, in his quest for mastery and his search for the essence of the art, he gained insight into the nature of the martial artist's way.
Aikido technique is based on circular movements around a center that is both stable and energized.
As with all Zen arts, the ultimate goal is personal transformation, through the perfection of the art form. Whether applying a technique, or taking a fall, the Aikidoist learns to merge with or capture the opponent's energy and harmlessly redirect it, avoiding injury to either him- or herself or the opponent.