On Intuition (until 1699)

"Reasoning draws a conclusion and makes us grant the conclusion, but does not make the conclusion certain, nor does it remove doubt so that the mind may rest on the intuition of truth, unless the mind discovers it by the path of experience."(Roger Bacon, "Opus Majus", cca. 1267) 

"The highest endeavor of the mind, and the highest virtue, it to understand things by intuition." (Baruch Spinoza, "The Road to Inner Freedom: The Ethics" , 1667)

“Education produces natural intuitions, and natural intuitions are erased by education.” (Blaise Pascal, “Pensées”, 1670)

 “Those rational instincts, the connate principles engraven in the human soul, though they are truths acquirable and deducible by rational consequence and argumentation, yet seem to be inscribed in the very crasis and texture of the soul, antecedent to any acquisition by industry or the exercise of the discursive faculty in man.” (Sir Matthew Hale, “The Primitive Origination of Mankind: Considered and Examined According to the Light of Nature”, 1677)

“Sometimes the mind perceives the agreement or disagreement of two ideas immediately by themselves, without the intervention of any other; and this, I think, we may call intuitive knowledge. [...] Intuitive knowledge needs no probation, nor can have any, this being the highest of all human certainty.” (John Locke, “An Essay Concerning Human Understanding”, 1689)

“Truth is the object of our understanding, as good is of the will.” (John Dryden, [Preface to (C A du Fresnoy, “The Art of Painting”, 1668)] 1695)