"I think generally it is rather difficult for later generations to escape the first impression that is given to some period or episode of history by contemporary historians who have had the first opportunity of giving a picture of it . . . . it is very difficult to be sufficiently on guard against the patterns that have been made for us by our predecessors."
After RKedit (in anthology on Anne Frank)
“…it is rather difficult for later generations to escape the first impression… given to some [historical] period by contemporary historians…It is very difficult to be sufficiently on our guard against the patterns that have been made for us by our predecessors."
[Reworked quote by Ron suggests room for improvement even within quotes; and it would read smoother yet without the ellipses.]