One of the results of the recent horrors here in France is the realization of the brevity of life.
People die. In the West, we have sheltered ourselves from death. In past centuries, war and disease made death more real, and less frightening for most people. But, the vulnerability of life is such that one must stop and think of the last four things.
I have several posts on this.
Stay in sanctifying grace, stay holy, make God your priority in life.
Realize that life is short, very short.