Yet they had a precursor, whose ideas had a considerable influence on Jung: the Austrian biologist Paul Kammerer, a wild genius who committed suicide in 1926, at the age of forty-five. — Arthur Koestler, The Roots of Coincidence One of Kammerer's passions was collecting coincidences.
Cu toate acestea, ei aveau un precursor, ale cărui idei au avut o influență considerabilă asupra lui Jung: biologul austriac Paul Kammerer, un geniu neîmblânzit care s-a sinucis în 1926, la vârsta de 45 de ani.” —Arthur Koestler, The Roots of Coincidence Una dintre pasiunile lui Kammerer a fost colectarea coincidențelor.