意怠免患
According to legend, there was a kind of birds called "dais" (swallow) on the East China Sea.

The Yidais were slow in reaction. They could not fly very high and seemed clumsy and incapable1.

But when they moved about, they always moved in groups, depended on one another for survival, and flew and landed together.

When they advanced, no one dared to advance rashly. When they retreated, no one dared to fall behind at will. When they fed, no one dared to scramble2 to be the first. All their activities were orderly.

When they went into action,万 dais always acted uniformly without any disorder3. They depended upon the collective efforts to avoid any harm from the outside world.

传说，东海上有一种叫做“意怠”的鸟。

意怠反应比较迟钝，不能高飞，似乎笨拙无能。