Unity in human affairs brings stable, ordered and durable conditions. Obviously, this is an auspicious time for great undertakings. But the powerful guiding force of a shared vision projected by a strong leader is essential to hold the forces of unity together, and advance them toward a common goal.
The image for this situation is that of a lake filling with water. Just as the fullness of the lake can bring good fortune to all in its sphere, it can also overflow, leading to calamity. Thus in a time of unity -- of gathering together -- it is essential that precautions against unforeseen danger be taken along with efforts to advance along a clearly-charted course. Much of human misfortune comes from unexpected events for which we are ill prepared; when gathered together with others, we are both more powerful, and more vulnerable.
