Be careful and mindful
Carelessness is the way of death. This is a good reminder for all human beings, as they like to live a careless life. Particularly, they like to postpone the time, when starting working; I will do it tomorrow, next week, next year etc. They seem to understand that they will never die. In fact, life is impermanent, they might know their birthday. However, they never know their death day. So, be careful and live a mindful life.