谁能翻译一下这句德语「Ein Mensch kann zwar tun, was er will, aber nicht wollen, was er will」？

I do not believe in free will. Schopenhauer's words: 'Man can do what he wants, but he cannot will what he wants,[Der Mensch kann wohl tun, was er will, aber er kann nicht wollen, was er will]' accompany me in all situations throughout my life and reconcile me with the actions of others, even if they are rather painful to me. This awareness of the lack of free will keeps me from taking myself and my fellow men too seriously as acting and deciding individuals, and from losing my temper." Schopenhauer's clearer, actual words were: "You can do what you will, but in any given moment of your life you can will only one definite thing and absolutely nothing other than that one thing." [Du kannst tun was du willst: aber du kannst in jedem gegebenen Augenblick deines Lebens nur ein Bestimmtes wollen und schlechterdings nichts anderes als dieses eine.]