What does Zhou Gong's mother mean by walking in the water?

I dreamed that my mother was walking in the water: what I did these two days should be decided by speed. Even for leisure travel, it is best to start early. Because the longer you delay, the easier it is to be confused and hesitant. The longer it takes, the harder it is to decide. If the last time is late, you can't choose anything. When you want to go for a walk and exercise, put it into action immediately.