Arnold van Praag, born in Amsterdam on 31 August 1900 as the son of Samuel van Praag and Sellie Koster, was a theology student of the Dutch Israelitic Seminary. In 1919, 1920 and 1921 he was called up for the selection board of the National Militia but was always exempted for a year by the Provincial Executive of North Holland as a student of theology. In June 1929, on the basis of his spiritual o…