Sir.Edward JENNER MD FRS quoted Lucretius on Title page of the "Causes and Effects of the Variolae Vaccinae" (1798)

What can give us more sure knowledge than our senses? How else can we distinguish between the true and the false?
  [Lat., Quid nobis certius ipsis
    Sensibus esse potest? qui vera ac falso notemus.]
      - De Rerum Natura (I, 700) [Knowledge]
Titus Lucretius Carus (c99BC - c 55BC.)

Sir.Edward Jenner MD(Thesis) FRS. (1749-1823. )