This is from the Catechism
Every action of yours, every thought, should be those of one who expects to die before the day is out. Death would have no great terrors for you if you had a quiet
conscience… Then why not keep clear of sin
instead of running away from death? If you aren’t
fit to face death today
, it’s very unlikely you will be tomorrow
Praised are you, my Lord, for our sister bodily Death,
from whom no living man can escape.
Woe on those who will die in mortal sin!
Blessed are they who will be found in your most holy
will, for the second death will not harm them.