Rudolf Virchow Quote

Cellular pathology is not an end if one cannot see any alteration in the cell. Chemistry brings the clarification of living processes nearer than does anatomy. Each anatomical change must have been preceded by a chemical one.

attributed to Rudolph Virchow Coper, H., Herken, H., 1963. Dtsch. Med. Wochenschr. 88,2025– 2036.