In addition to the previous one - the same quotation, but not with our forum. Once upon a time long ago in a book I read a short verse of a Spanish poet-philosopher, translated into Russian. Unfortunately, I do not remember the names of the author and translator. But remember the verse:
Who knows, he does not dare,
And who dare - do not know how.
Who wants to, he does not know
And who knows - does not want.
So from age to age is.