They worry about whether they are getting as much praise as others, and whether what somebody has said is really an insult of some kind. A society without a powerful authority keeping people in order will become a society full of warfare. Nothing will ever get done because everybody is too busy fighting with each other. There will be no business, no building, no knowledge, no arts, no culture. Everything will be destroyed as quickly as it can be built.
Humans are obviously passionate and violent.
What is less obvious according to Hobbes is that they are also reasonable. Their passions cause war, but it is their reason which makes them finally realize that it is only in peace that a better life is possible. Reason tells people that society must have discipline and order if anybody is to get anywhere. If people are afraid of what will happen to them when they break the law, then they will conclude it is better to obey the law. Reason tells people that having a sovereign with the power and the ruthlessness to maintain peace and order is the only way of building a society that has any kind of justice in it.