Six in the fourth place means

The well is being lined. No blame.

True, if a well is being lined with stone, it cannot be used while the work is going on. But the work is not in vain; the result is that the water stays clear. In life also there are times when a man must put himself in order. During such a time he can do nothing for others, but his work is nonetheless valuable, because by enhancing his powers and abilities through inner development, he can accomplish all the more later on.