Life is always worrisome and you never know what is going to happen next moment in such a scenario either you need to be alert always or you need someone to take care of you.
When we sleep peacefully at night, there is someone who is wake up all through the night to make sure we get a peaceful sleep. There is no job in this world that is small enough everyone has their own sense of responsibility and work ethic by which they abide and they do it very diligently.
Sometimes I feel pity for them as they have to be awake the entire night to secure us from any threat but then someone has to perform that duty and if that person is doing it with passion then such person is due for good respect as it may sound very simple but it requires lots of effort to be awake when everyone is sleeping.