Sure wish I could collect £5 for every time I have seen this quote out of context. Just try google on the quote, and the first two pages of hits are from 'Creation Science' or similar websites.
But you have to find the original to get the balance of the paragraph, to wit:
An honest man, armed with all the knowledge available to us now, could only state that, in some sense, the origin of life appears at the moment to be almost a miracle so many are the conditions which would have had to have been satisfied to get it going. But this should not be taken to imply that there are good reasons to believe that it could not have started on the earth by a perfectly reasonable sequence of fairly ordinary chemical reactions.
My emphasis. The next paragraph goes on:
The plain fact is that the time available was too long, the many microenvironments on the earth's surface too diverse, the various chemical possibilities too numerous and our own knowledge and imagination too feeble to allow us to be able to unravel exactly how it might or might not have happened such a long time ago, especially as we have no experimental evidence from that era to check our ideas against. [(Francis Crick, Life Itself, Its Origin and Nature, 1981, p. 88)]
David Limbaugh, "The Left lies because it must," 2006-01-27 (http://www.freerepublic.com/focus/news/1566019/posts)