In the Catholic world, the last four things represent Death, Judgement, Heaven, and Hell. All of us will die. All of us will face a judgement. Will we see heaven or will we see hell? Each moment on this earth affords us a choice.
We are nearing the end of the Liturgical year and the beginning of Advent. What a wonderful time to reflect and renew our faith.
Check out Audio Sancto for some good advice.