I have heard and seen in print many times the quotation attributed to Achad Ha'am that "more than Jews have kept the sabbath, the sabbath has kept the Jews" (exemplified in all its unattributed commonness here and here, results of Googling). Did he actually say or write this?
I am not so interested in the source, as much as I am a yes/no answer to whether Achad Ha'am is its correct attribution.