The stages of human development are to strive for: (1) Besitz [Possession] (2) Wissen [Knowledge] (3) Können [Ability] (4) Sein [Being]. — Erwin Schrodinger Copy Share Image
![“The stages of human development are to strive for: (1) Besitz [Possession] (2) Wissen [Knowledge] (3) Können [Ability] (4) Sein [Being].” quote by Erwin Schrodinger](https://sms4smile.com/quotes/img-quotes/a42/erwin-schrodinger-8450_ability_the-stages-of-human-development-are-to-s_2002900.jpg)