 Meyerbeer 's personal attachment to Judaism was a mature personal decision – after the death of his maternal grandfather in 1811 he wrote to his mother ' Please accept from me a promise that I will always live in the religion in which he died ' . In his diaries he noted significant family events including birthdays , not by their Gregorian calendar occurrence , but by their Jewish calendar dates . Moreover , he regularly suffered from ( and / or imagined ) anti @-@ Jewish slights throughout his life , warning his brothers frequently in his letters against richess ( Yiddish for ' Jew @-@ hatred ' ) . Writing to Heinrich Heine in 1839 , he offered the fatalistic view : 
 Meyerbeer <a href='null_genetive' title='1'><mark>'s</mark></a>personal attachment to Judaism was a mature personal decision – after the death of his maternal grandfather in 1811 he wrote to his mother ' Please accept from me a promise that I will always live in the religion in which he died ' . In his diaries he noted significant family events including birthdays , not by their Gregorian calendar occurrence , but by their Jewish calendar <a href='uninflect' title='2'><mark>dates</mark></a> . Moreover , he regularly suffered from ( and / or imagined ) anti @-@ Jewish slights throughout his life , warning his brothers frequently in his letters against richess ( Yiddish for ' Jew @-@ hatred ' ) . Writing to Heinrich Heine in 1839 , he offered the fatalistic view : 
Meyerbeer  personal attachment to Judaism was a mature personal decision – after the death of his maternal granddaddy in 1811 he wrote to his mother ' Please accept from me a promise dat I'ma always live in the religion in which he died ' . In his diaries he noted significant fam events including birthdays , not by their Gregorian calendar occurrence , but by their Jewish calendar date . Moreover , he regularly suffered from ( and / or imagined ) anti @-@ Jewish slights throughout his life , warning his brothers frequently in his letters against richess ( Yiddish fir ' Jew @-@ hatred ' ) . Writing to Heinrich Heine in 1839 , he offered the fatalistic view :