Memento mori

Memento mori (Wikipedia)

Vita brevis breviter in brevi finietur,
Life is short and shortly it will end

Mors venit velociter que neminem veretur,
Death comes quicker than you think

Omnia mors perimit et nulli miseretur.
It takes everything away, but takes pity on no one

Ad mortem festinamus peccare desistamus.
We hasten towards death, we shall restrain from sinning


Ni conversus fueris et sicut puer factus
If you don’t repent and become pure as a child

Et vitam mutaveris in meliores actus,
And if you don’t change your life by doing better,

Intrare non poteris regnum Dei beatus.
You cannot enter the Kingdom of God.

Ad mortem festinamus peccare desistamus.
We hasten towards death, we shall restrain from sinning

(The Catalan Llibre Vermell de Montserrat, 1939)

I agree with the first verse (first 4 lines).