Truth then seems to me, in the proper import of the word, to signify nothing but the joining or separating of Signs, as the Things signified by them do agree or disagree one with another. The joining or separating of signs here meant, is what by another name we call proposition. So that truth properly belongs only to propositions: whereof there are two sorts, viz. mental and verbal; as there are two sorts of signs commonly made use of, viz. ideas and words.
John LockeThe visible mark of extraordinary wisdom and power appear so plainly in all the works of creation.
John LockeReading furnishes the mind only with materials of knowledge; it is thinking that makes what we read ours.
John Locke