The Devil is in the details, but so is salvation.
Great minds discuss ideas, average minds discuss events, small minds discuss people.
Though Rickover quoted this, he did not claim to be the author of the statement. Using it in "The World of the Uneducated" in The Saturday Evening Post (28 November 1959), he prefaces it with "As the unknown sage puts it..." — It has sometimes been attributed to Eleanor Roosevelt, but without definite citation.
You have to learn from the mistakes of others. You won't live long enough to make them all yourself.
Variations of this quote have been attributed to a number of people, including Eleanor Roosevelt, Samuel Levenson, and Lao Tzu; there is no solid support for any such attribution.