“We now know that linguistic change does not operate in such an across-the-board manner. Some speakers introduce the change into their speech before others; some use it more frequently and consistently than others; and some words are affected before others. A more accurate view is to think of a change gradually spreading through the words of a language – a view that is known as a lexical diffusion. At first just a few people use a change sporadically in a few words (commonly occurring words are influenced very quickly); then a large number of words are affected, with the sound gradually being used more consistently; then the majority of the words take up the change.”
Source: How Language Works, 2007, p. 359
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David Crystal 24
British linguist and writer 1941Related quotes

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Commencement Address at Dartmouth College June 9th, 2002 http://www.dartmouth.edu/~news/releases/2002/june/060902c.html

Revelation, when applied to religion, means something communicated immediately from God to man.
No one will deny or dispute the power of the Almighty to make such a communication, if he pleases. But admitting, for the sake of a case, that something has been revealed to a certain person, and not revealed to any other person, it is revelation to that person only. When he tells it to a second person, a second to a third, a third to a fourth, and so on, it ceases to be a revelation to all those persons. It is revelation to the first person only, and hearsay to every other, and consequently they are not obliged to believe it.
When Moses told the children of Israel that he received the two tables of the commandments from the hands of God, they were not obliged to believe him, because they had no other authority for it than his telling them so; and I have no other authority for it than some historian telling me so. The commandments carry no internal evidence of divinity with them; they contain some good moral precepts, such as any man qualified to be a lawgiver, or a legislator, could produce himself, without having recourse to supernatural intervention.
When I am told that the Koran was written in Heaven, and brought to Mahomet by an angel, the account comes too near the same kind of hearsay evidence and second-hand authority as the former. I did not see the angel myself, and, therefore, I have a right not to believe it.
When also I am told that a woman called the Virgin Mary, said, or gave out, that she was with child without any cohabitation with a man, and that her betrothed husband, Joseph, said that an angel told him so, I have a right to believe them or not: such a circumstance required a much stronger evidence than their bare word for it; but we have not even this — for neither Joseph nor Mary wrote any such matter themselves; it is only reported by others that they said so — it is hearsay upon hearsay, and I do not choose to rest my belief upon such evidence.
1790s, The Age of Reason, Part I (1794)

Ruth Levinson, Chapter 14 Ira, p. 199
2009, The Longest Ride (2013)

As quoted in a 14 April 1981 interview on The Mike Walsh Show http://colsearch.nfsa.gov.au/nfsa/search/display/display.w3p;page=0;query=Dusty%20Springfield%20Mike%20walsh;rec=0;resCount=10.

Source: Our Modern Idol: Mathematical Science (1984), p. 95.