“Literally, then, is easy. It was originally one more variation on indicating truth—specifically exactness, as in “by the letter”: He took the advice literally; He meant it literally. But that can have been only a snapshot along a time line; there was never any question that literally was going to morph into other meanings. The only question was what kind. For one, literally quite predictably went beyond its original meaning into one where “by the letter” no longer makes sense except as a metaphor: We were literally the only ones there; We were literally on the brink of a depression. There are no letters involved in these statements, but literally means that the statement is true in a specific way—as in what we sometimes even refer to as “by the letter.” A next step was for literally to go personal, on a mission less to specify than to vent.”