“Most Holy Father, there are many who, on bringing their feeble judgment to bear on what is written concerning the great achievements of the Romans — the feats of arms, the city of Rome and the wondrous skill shown in the opulence, ornamentation and grandeur of their buildings — have come to the conclusion that these achievements are more likely to be fables than facts. I, however, have always seen — and still do see —things differently. For, bearing in mind the divine quality of the ancients' minds as revealed in the remains still to be seen among the ruins of Rome, I do not find it unreasonable to believe that much of what we consider impossible seemed, to them, exceedingly simple.”

Source: The Origin of Species

Ch. 1. http://books.google.com/books?id=AEk0AAAAIAAJ&q=%22The+more+people+have+studied+different+methods+of+bringing+up+children+the+more+they+have+come+to+the+conclusion+that+what+good+mothers+and+fathers+instinctively+feel+like+doing+for+their+babies+is+usually+best+after+all%22&pg=PA4#v=onepage
Dr. Spock's Baby and Child Care (1945)

Letter to Isham Reavis (5 November 1855)
1850s
Context: If you are resolutely determined to make a lawyer of yourself, the thing is more than half done already. It is but a small matter whether you read with anyone or not. I did not read with anyone. Get the books, and read and study them till you understand them in their principal features; and that is the main thing. It is of no consequence to be in a large town while you are reading. I read at New Salem, which never had three hundred people living in it. The books, and your capacity for understanding them, are just the same in all places.... Always bear in mind that your own resolution to succeed, is more important than any other one thing.

A Night at the Met (1986)

Misattributed

What's So Funny? (2007)

Source: Gilead

Speech at the 2016 Republican National Convention (July 19, 2016)