“As for man, his days are like grass; as a flower of the field, so he flourishes. For the wind passes over it, and it shall not be, and it shall know its place no more. But the mercy of the Lord is from generation to generation on those who fear him…” (Ps 102: 15-17a, LXX)
To “remember that you will die” (memento mori) has been considered a healthy sort of reflection, since ancient times. It’s not a morbid thought, in light of the New Life we look toward, in Christ. But it’s also both liberating and sobering for our here and now, as the reality of death helps us to cherish/prioritize what really matters to us, “at the end of the day,” and to take a step back from unnecessary concerns and battles, if we’ve become entangled in them.