His parents and his sister retained their Jewish faith but Stein and his brother, Ernst Eduard, were baptised as Lutherans, apparently to free them from the anti-semitism which would have denied them access to education and advancement.
Părinții și sora lui au păstrat credința Iudaică, dar Stein și fratele său, Ernst Eduard, au fost botezați ca luterani, aparent pentru a îi elibera de limitările aduse de anti-semitism, care le-ar fi împiedicat evoluția.