Classic Poem

A well-sharp'd pencil leads one on to write:
When guns are cocked, the shot is guaranteed;
The primed occasion puts the deed in sight:
Who steals a book who knows not how to read?

Seeing a pulpit, who can silence keep?
A maid, who would not dream her ta'en to wife?
Men looking down from some sheer dizzy steep
Have (quite impromptu) leapt, and ended life.