When a sentence begins with "Life is short, .... " there can be so many ways to complete it.
Depending on the view of life and the reflections that come along with it, it can be like "Life is short ... " so be happy, don't worry, enjoy it, treasure it, etc.
In Psalm 90 (89), there is this verse: Lord, make us know the shortness of our days, so that we may gain wisdom of heart.
So the reality is that life is short, that our life on earth is only temporary, and that we can't bring anything along to the next life.
So in Psalm 90, there is a prayer to the Lord to grant wisdom of heart so that we can live life wisely.
In the gospel, Jesus made it clear that He did not come to abolish the Law but to complete it.
And He also warned that anyone who infringes the least of the commandments and teaches others to do the same will have severe consequences.
To keep the commandments of the Lord would require the gift of wisdom from the Lord so that we can follow the commandments wisely and humbly.
Any glorious achievements on earth can never be as great as living life humbly, simply and peacefully on earth.
May we have the wisdom to remember that and live according to the commandments of the Lord.