The historian Willy Cohn kept a diary from his youth till his death in 1941. The book contains the entries written from 1933 till 1941, which had been hidden in Berlin by family members. This is a comprehensive document containing deep, serious descriptions. The diary was written from a subjective point of view, but also from the point of view of a professional historian. Cohn described the initial shock felt when the Nazis came into power, and the deep disappointment with the disappearance of the humanistic and democratic values he believed in which collapsed right in front of his eyes, as well as the move of many acquaintances to ‘the other side’. This reality created an ongoing conflict with the German patriotism which was part of his personality and became empowered even more during his military service in World War I . The diary includes much documentation of the Jewish community’s life: the efforts made and actions taken in dealing with the economic collapse which resulted from Nazi policy; the serious debate between the Orthodox and the Liberals, between Zionists and non-Zionists, regarding the objectives of the community youth's education; the cultural renaissance which took place within German-Jewish society in the first years of the Nazi regime, which Cohn was a part of by lecturing in his town and in many other communities on topics of Jewish history and Zionism. The stronghold which tightened around the Jewish community after the November 1938 pogrom (Kristallnacht), the isolation which was even more hurtful than the life-threatening economic hardship, the relationships between Jews and non-Jews during these times of crisis, the hope that the German people still has positive forces which will overcome evil, and the desperate efforts to leave Germany and immigrate to Israel – all these are expressed in a unique manner in the diary .