15:25 Regret and life lessons. They are extremely important. Whatever happens may cause suck, but in the end, almost everything will help us become a better person. We learn things and gain knowledge from our mistakes. Perhaps we can pass down that information to the next generation, and also help them as they go through the same attempts.
Maintain harmony, when everyone is happy it tends to increase productivity. Work can be negative, this is why sometimes it can be very unproductive. Like having your boss hovering over you, making you nervous. Most of the time, you begin to observe other members of your work force, figuring out the consensus opinion. Thinking about the consequences of disagreeing. Everyone is doing the same thing.