This is a fascinating picture into the hearts of the three. They were desiring a righteous desire, but in comparison to the desire of their fellows to speedily come to the Messiah, it probably felt that they wanted to dawdle in their coming to the Messiah. They have sorrow in their hearts because of self-doubt, and increased no doubt by that too-human tendency to compare ourselves to others and assume that we fall short of the good that we see others do.