Thefollowingsentenceappliestothatapriorijudginganduncandidclassofindividualswhobuytheirdinnerswithouttastingallthefoodthereisinthemarket。“Onalldiscoveriestherearepersonswho，withoutdescendingtoanyinquiryintothetruth，pretendtoknow，asitwerebyintuition，thatnewlyassertedfactsarefoundedinthegrossesterrors。ThesewerethosewhoknewthatHarvey’sreportofthecirculationofthebloodwasapreposterousandridiculoussuggestion，andinlatterlaterdaystherewereotherswhoknewthatFranklindeservedreproachfordeclaringthatpointswerepreferabletoballsforprotectingbuildingsfromlightning。“
Again：“Thisunwarrantablemodeofofferingassertionforproof，sounauthorizedandevenunprecedentedexceptinthecondemnationofaGalileo，thepersecutionofaCopernicus，andafewotheractsofinquisitorialauthority，inthetimesofignoranceandsuperstition，affordsbutalamentableinstanceofoneofhisremarks，thatthisisfarfrombeingtheAgeofReason。“
“ThemostvaluablemedicinesintheMateriaMedicaactonprinciplesofwhichwearetotallyignorant。Nonehaveeveryetbeenabletoexplainhowopiumproducessleep，orhowbarkcuresintermittentfevers；andyetfew，itishoped，willbesoabsurdastodesistfromtheuseoftheseimportantarticlesbecausetheyknownothingoftheprincipleoftheiroperations。“Oriftheargumentispreferred，intheeloquentlanguageofthePerkinisticpoet：
“WhatthoughtheCAUSESmaynotbeexplained，SincetheseEFFECTSaredulyascertained，Letnotself-interest，prejudice，orpride，Inducemankindtosetthemeansaside；
Meanswhich，thoughsimple，arebyHeavendesignedtoalleviatethewoesofhumankind。“