Let's legislate it then

Could someone please tell me the origin (author) of the phrase, "There' s none so blind as those who won't see. ".
Sincerely,
Bede Cleary

Jonathan Swift

Is the wording correct? I can't find the quote on the usual sources. I seem to remember it as "There's none so blind as he who will not see." which makes a tidy line of iambic pentameter. "... won't see" sounds clunky at the end. (That doesn't mean it isn't correct, of course....)

The archives have "There are none so blind as those who will not see": www.phrases.org.uk bulletin_board 5 messages 1615.html (link below).

The sources have a number of slight variations, so let's bless "There's none so blind as those who will not see," for its metrical felicity. Then next year, put it in a Googlefight, and see how effective we've been ....