Gisella Perl
"[My father said] 'I do not want my daughter to lose her faith and break away from Judaism.' ... Several months later, she approached him again, this time with a prayer book he had given her, and said, 'I swear on this book that wherever life will take me, under whatever circumstances, I shall always remain a good, true Jew.'  Maurice Perl relented, and she enrolled in medical school. Years later, on the day she was paid a fee by her first patient, she bought another prayer book and had engraved on it her father's name.  ...