The "simple" in "simple" means "maintaining unity and not being tedious." "Su" means frugal and "having the important things and avoiding waste." "Shinshin" includes three hearts, and "Shinshin" is a true heart without falsehood. "Jikishin" is pure trusting and flexible heart with Junichi. "Seimei Shin" is a pure and bright heart. The secret to cultivating a beginner's mindset is to refrain from starting things, take care of them, and keep your "Motto" and "Book of the Right" close to you and always use them as pillars of your heart.