Jabber:
Anyone familiar enough with Jefferson would know that half that quote couldn't have come from Jefferson.
from the scholars at the
official Monticello site:
"I have recently been examining all the known superstitions of the world, and do not find in our particular superstition [Christianity] one redeeming feature. They are all alike founded on fables and mythology."
We are asked about this one on a fairly regular basis. As with many spurious Jefferson quotes, it is frequently seen on various Internet sites. Many sites do not cite a source, but a good number of those that do attribute this quote to a letter from TJ to a "Dr. Wood." As far as we know, TJ never wrote to an individual calling him/herself Dr. Wood. Another suspicious element is the statement that he does not find in Christianity "one redeeming feature." One presumes that Jefferson did, in fact, find some redeeming features in Christianity, otherwise he would not have taken the time to paste together his own versions of the Bible. See the report Jefferson's Religious Beliefs for more information.
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the second part of your quote is deceptively edited to remove Jefferson's approbation of Jesus. Full quote:
"..that rational men not being able to swallow their impious heresies, in order to force them down their throats, they raise the hue and cry of infidelity, while themselves are the greatest obstacles to the advancement of the real doctrines of Jesus, and do in fact constitute the real Anti-Christ."
Letter to William Baldwin, 19 January 1810. Adams, page 344.
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But to the larger point. Jeffersons rantings in private letters on certain aspects of Christianity hasn't much bearing on The United States. His influence on our founding is more limited than most folks think, and his manifest contradictions (as Tenzing sarcastically points out) make him less likable than many of his contemporaries.
Jefferson was used by his buddies to write the Declaration of Independence because of his superior rhetorical skills, not his brains. Jefferson had no part in writing the real stuff--the Constitution and papers arguing positions on various aspects of it. That was left to better heads. Jefferson's huge correspondence with Adams certainly confirms his second-rate status as a thinker when compared his top contemporaries on these political questions.
My ideas on
Christianity and US I've stated elsewhere here, but it is true that most of these men did believe in Jesus--or in Jefferson's case, held Jesus in high esteem.