▁several ▁years ▁at ▁Paris ▁as ▁t utor ▁in ▁the ▁house ▁of ▁A aron ▁An sel m ▁Roth sch ild . ▁Upon ▁his ▁return ▁from ▁Paris ▁in ▁ 1 8 4 2 ▁Cre izen ach ▁became ▁teacher ▁in ▁the ▁Jewish ▁Phil anth rop in ▁at ▁Frank fort - on - the - Main , ▁and ▁was ▁one ▁of ▁the ▁principal ▁found ers ▁of ▁the ▁Frank fort ▁Jewish ▁Reform verein ; ▁in ▁ 1 8 5 4 , ▁however , ▁he ▁abandoned ▁the ▁faith ▁of ▁his ▁f athers ▁and ▁emb rac ed ▁Christian ity . ▁Cre izen ach ▁was ▁made ▁teacher ▁of ▁the ▁Frank fort ▁municipal ▁high ▁school ▁in ▁ 1 8 5 9 , ▁and ▁appointed ▁professor ▁of ▁history ▁and ▁literature ▁at ▁the ▁Frank fort ▁g ymnasium ▁in ▁ 1 8 6 3 . ▁ ▁In ▁the ▁literary ▁world ▁he ▁attract ed ▁attention ▁by ▁his ▁poetry : ▁D icht ungen , ▁Frank fort , ▁ 1 8 3 9 ; ▁and ▁Ged ichte , ▁Frank fort , ▁ 1 8 4 8 ; ▁ 2 d ▁ed ., ▁ 1 8 5 1 . ▁Being ▁familiar ▁with ▁the ▁person ality ▁and ▁life ▁of ▁Go ethe ▁in ▁his ▁relations ▁to ▁Frank fort , ▁he ▁edited ▁and ▁published ▁Go ethe ' s ▁correspond ence ▁with ▁Marian ne ▁von ▁Wille mer , ▁under ▁the ▁title ▁Der ▁Br ief we chsel ▁Zwischen ▁Go ethe ▁und ▁Marian ne ▁von ▁Wille mer , ▁ 2 d ▁ed ., ▁Stuttgart , ▁ 1 8 7 8 . ▁ ▁In ▁conj unction