Nothing seems to motivate them. They surprise no one, least of all themselves. When you push them, they go wherever you want them to. Or, they just follow the herd, mindlessly ploddling along. It's rumored that when they're sleeping, you can tip them over.
Cows lead boring, uneventful lives.
And they couldn't care less. They follow the unspoken cow rules. In the end, they're led to the slaughter. After a manager has interviewed 80 or 100 job candidates, he comes to the conclusion that my friend is right. That's why managers so often move on to the next job candidate.