Too full for words

Posted by Polaris on October 12, 2004

I have come across a couple of sentences that included "Too full for words" mostly in connection with the heart (Faulkner and others) as in

"my heart is too full for words"

also there are similar expressions as in
too marvellous for words,
too clever for words,
too funny for words, etc

can any one help with meaning and origin? thanks.