"Happiness is not a matter of intensity": It suggests that pursuing extreme highs or intense emotions alone is not the key to lasting happiness. Moments of intensity may come and go, but they don't necessarily sustain happiness.
"But of balance, order, rhythm, and harmony": These qualities are highlighted as essential elements in achieving happiness. Balance implies a sense of equilibrium in various aspects of life, while order suggests organization and clarity. Rhythm implies a sense of flow and consistency, and harmony signifies the blending of different elements into a unified and pleasing whole.
In essence, this quote encourages individuals to seek a well-rounded and harmonious life, where they balance their experiences, maintain order and structure, establish a consistent rhythm, and create harmony among various aspects of life. It suggests that by finding this balance and integrating these qualities, one can cultivate a deeper and more sustainable sense of happiness and contentment.