Twice in one day - this could become a habit!

I have just noticed the verse for today and was quite intrigued by the concept of becoming like wool. I am sure the writer was referring to the whiteness of wool but when I look in my wife's knitting bag I see all sorts of colours including some wool that has a number of colours in one ball and knits some very interesting patterns.
It's quite funny to me how occasionally something like this will just strike a chord and a scripture you have read many time throws up a new thought - could Isaiah have written this today given the range of different coloured wools available? Would we and do we understand what he means by this or do we get confused by our modern idea of wool?.