"But I am convinced that certain primary seeds of truth naturally implanted in human minds thrived vigorously in that unsophisticated and innocent age - seeds which have been stifled in us through our constantly reading and hearing all sorts of errors"
— Descartes, René (1596-1650)
(Rule 4, p. 17-20)
See Opuscula posthuma, physica et mathematica (Amsterdam: P. and J. Blaeu, 1701).
Not published in Descartes' lifetime. Dutch translation in 1684; published in Latin in 1701.