Six at the top means:
When inner shock is at its height, it robs a man of reflection and clarity of vision. In such a state of shock it is of course impossible to act with presence of mind. Then the right thing is to keep still until composure and clarity are restored.
But this a man can do only when he himself is not yet infected by the agitation, although its disastrous effects are already visible in those around him. If he withdraws from the affair in time, he remains free of mistakes and injury. But his comrades, who no longer heed any warning, will in their excitement certainly be displeased with him. However, he must not take this into account.