285 letters on medicine as practice (complementing the health letters, which cover the patient's soul), 1950s-heavy (172) with a 1970s return (64). The standing rule: a consilium of two specialist doctors, then do as they rule. The distinctive themes: surgery and irreversible procedures only after exhausting alternatives — including the lobotomy refusal ("a partial murder of the soul"); hands for medicine, mind for Torah — don't study your own case, it breeds melancholy; and the late-emerging "doctor who is a friend" register (16 of 18 in the 1970s).
Where people expect either "trust G-d, skip the doctors" or "just follow the doctors," he holds both legs in their proper roles. Medicine is a natural vessel one is obligated to use — the Torah "gave the doctor permission to heal" — approached with a working clinician's caution: two experts, the reversible before the irreversible, and a granular eye for the halacha a physician would never think to ask about.
The recurring directives, by how often each surfaces across the 285 letters.
The grounding phrase, again and again: התורה נתנה רשות לרופא לרפאות — "the Torah gave the doctor permission to heal." Using a good doctor is not a lapse of faith; it is the faith, made into a vessel.
He reasons like a careful physician who is also a posek: defer to the expert, prefer the reversible, guard against the cut that cannot be undone — and never let the natural vessel stand without the spiritual one beside it. Here, verbatim.