Writer's Block

I am now trying to write a book. I am on the second paragraph now, with only another few thousands to go. Trying to write that book makes me look at writers in a different light. I have always respected their discipline and focus, now I respect them even more. For example, it must have taken a great research effort to write something like the 'Da Vinci Code' (or its rebuttals). And I think the important thing is to keep writing, with the goal of a completed book embedded in my mind.