If you take one concept from a year of these letters, make it this one.
Ayurveda distinguishes a food's temperature from its virya — its heating or cooling action on the body. They are frequently opposite, and the gap between them explains most of the confusion people have with this system.
Ghee is warm off the stove and cooling in effect. Amla tastes sour, which should heat, and is cooling — the tradition treats it as a specific exception. Fennel and coriander are cooling and are perfectly good in a hot tea. Chilli is cooling in the mouth and violently heating afterwards. Ice cream is cold in the mouth, and its sugar and dairy fat leave a Pitta system worse off than a warm cup of coriander water would.
Why this matters right now: Pitta is aggravated, so you need to cool. But agni is still rebuilding from the monsoon's low, so cold food will stall it — and a stalled agni produces ama, which is a different and worse problem than a hot one. The two requirements look contradictory. Virya is how you satisfy both. Warm food with cooling action. Room-temperature water rather than iced. Coriander, fennel, cardamom, mint, rose. Ghee rather than butter. Sweet, well-cooked grains. Bitter greens, cooked and warm.
The practical rules for the fortnight: nothing straight from the fridge. Warm or room temperature, always. Cool the effect, not the plate.
Worth knowing where the exception lives — genuinely cold things have a place in acute heat. A cold compress on hot eyes, cool water on the face, a cool shower after real exertion. Applied outside, cold is fine. Swallowed, it costs you digestion you cannot spare in October.
And a note on the six tastes, since autumn is where they become obvious. Sweet, bitter and astringent all cool. Sour, salty and pungent all heat. That single sentence lets you build a Pitta-season meal without a reference table.