When anything is present to the mind, what is the very first and simplest character to be noted in it, in every case, no matter how little elevated t… - Charles Sanders Peirce

A pair of statements may be taken conjunctively or disjunctively; for example, "It lightens and it thunders," is conjunctive, "It lightens or it thunders" is disjunctive. Each such individual act of connecting a pair of statements is a new monad for the mathematician.

A finite interval of time generally contains an innumerable series of feelings; and when these become welded together in association the result is a general idea.

In all the works on pedagogy that ever I read — and they have been many, big, and heavy — I don't remember that any one has advocated a system of teaching by practical jokes, mostly cruel. That, however, describes the method of our great teacher, Experience.