happiness and health
Formal epistolary expression used in letters to wish the recipient well-being. Typically appears in set phrases like ご清祥のことと存じます.
I sincerely wish you all happiness and good health.
After the seasonal greeting, one continues with 'I trust you are in good health and spirits.'
Compound of 清 (pure, clear) and 祥 (auspicious, good omen), conveying a wish for pure happiness and good fortune. The exact historical derivation is uncertain, but the combination is conventional in formal letter writing.