3. Does having happy train of thought provide more "power" or Ki than if you had an angry train of thought or and intention to really hurt someone? Sam - USA

... Your question about having a happy train of thought (and its relation with more "power" or Ki, instead of an angry thought and/or intention to really hurt someone) is one of the key elements in martial arts study and evolution.
... We are what we think and we experience what we feel. When a happy and positive attitude is applied, many studies revealed a notable improvement of the body physiology, mentally we are able to approach situations and circumstances with a much clear resolution, and the inner sense of well-being will provide a palpable sensation of harmony that is contagious with others. Certainly you will enjoy your training more.
... This is not to be confused with the energy afforded by the intention to survive or persevere that sometimes is called upon in emergencies which may include an attack on the person. Some styles of self defense training encourage the "victim" to corral their anger and use it against their attacker. We prefer to redirect the anger of the attacker against their attack, and preserve the sense of power and identity in a positive way that is truly personal defense. Anger, while appearing to be a powerful emotion in the moment, almost always drains your energy and cannot be sustained without damaging your own physiology and psyche.
... Our motto in Gorindo, is "breathe, relax and smile." Perhaps a simple formula but a well geared attitude to improve inner power or Ki, and its expressions of joy, camaraderie, rightness and cooperation to help others. A constructive intention will create a positive echo that will feedback to your Ki, and angry attitude although may do the job will also drain your Ki and reduce its capacity. Think about it.