CURRENTLY I feel hyper-happy. Why? My physiological strength is off the Richter.
WHAT IS THE GREATEST HAPPINESS?
To me, all forms of happiness are legitimate. But the better question:
What is the HIERARCHY of happiness. Meaning — which happiness reigns supreme?
To me, it is the physiological. What is physiology? Let me explain.

What has to do with the human body?
Physiology — dealing with growth, and natural organisms.
Or in more simple terms:
Anything within YOUR HUMAN BODY is physiological.
Why focus on physiology?
Certainly happiness is produced within our bodies. Hormones, serotonin, brain-electricity, blood, etc. Happiness cannot exist outside of your body.
How to better your physiological health
It seems the way to make the body stronger:
Pain, difficulty, challenge as the stimulus to growth and MORE POWER.
For example:
- Weight-lifting to INCREASE YOUR STRENGTH and muscle mass.
- Intermittent fasting: This actually strengthens your body. You will also live longer [hopefully to age 120].
- Cold training: Take cold showers. Good to burn off fat [brown adipose tissue, ie. B.A.T.]. I also walk almost around all the time in my t-shirt, even when it is very cold. I push the limits of my cold-resistance to pain, and it has literally built me a thicker skin.