The lives of people that it briefly. Because we can not know in advance the event that it happens to us. So I just have to do what we want to do but need to do things correctly.
Life it short because we can't know in advance of events that it happened to us? Therefore, we would like to do whatever needs to be done, but must be doing something right.
people's lives, it's short because we do not know in advance that it can be what is going to happen to us, so we wanted to do what we have to do it, but it must be doing the right thing.