"Notebooks are beholden to their authors. Their function is limited only by the imagination of their owner."
"Your notebook greets you each morning with the pure, blank slate of an empty page. It serves as a small reminder that the day is as yet unwritten."
"Your notebook evolves as you do. You might say that you co-iterate. It will conform to your ever-changing needs. The lovely side effect is that as the years pass, you're creating a record of your choices, and the ensuing experiences."
Ryder Carroll, The Bullet Journal Method: Track your Past, Order your Present, Plan your Future.
From Seneca comes the book's epigraph: "Let us postpone nothing. Let us balance life's account every day ... One who daily puts the finishing touch to his life is never in want of time."