"Now, we have already demonstrated, that a falsehood can never be clearly conceived or apprehended to be true, because a falsehood is a mere non-entity; and whatsoever is clearly conceived or understood, is an entity. Nay, the true knowledge or science which exists nowhere but in the mind itself, has no other entity at all besides intelligibility ; and therefore, whatsoever is clearly intelligible."
January 1, 1970
https://en.wikiquote.org/wiki/Intelligibility