Aikido principles in theory & applied
O'Sensei admonishes in his book, Budo,'...do not go after many techniques...', but rather,'...strive to learn the principle(s) behind techniques, and one by one make each technique your own' (this isn't an exact quote, but it's accurate in principle, pun intended). We learn techniques to train ourselves in the principles of Aikido, to interact according to those principles[harmoniously], with our environment and the people in it. The techniques, which are specific/"static", are the embodiment of the principles, which are dynamic. This is Takemusu Aikido. We cannot, therefore, learn these principles without training/experience.
What principles do you find most relevant to your training and the training of others, both theoretically and applied?