A SIMPLE KEY FOR EL SECRETO UNVEILED

Because they resorted to Einstein, it's important to keep in mind he also wrote once a quiet and modest everyday living provides a lot more joy than a pursuit of achievement sure with frequent unrest⁵.El secreto ha sido parodiado en el episodio de Los Simpson "Bart Will get a 'Z'", donde Bart obtiene para su maestra un libro titulado The solution