So remember your Creator in the days of your youth:

Before the days of adversity come,
and the years approach when you will say,
“I have no delight in them”;

For You record bitter accusations against me
and make me inherit the iniquities of my youth.

Do not remember the sins of my youth
or my acts of rebellion;
in keeping with Your faithful love, remember me
because of Your goodness, Lord.

Since all these things are to be destroyed in this way, it is clear what sort of people you should be in holy conduct and godliness

Sorrow

For we are consumed by Your anger;
we are terrified by Your wrath.

And put

His bones may be full of youthful vigor,
but will lie down with him in the grave.

Therefore, dear friends, since we have such promises, let us cleanse ourselves from every impurity of the flesh and spirit, completing our sanctification in the fear of God.

Flee from youthful passions, and pursue righteousness, faith, love, and peace, along with those who call on the Lord from a pure heart.

For

“Absolute futility,” says the Teacher.
“Absolute futility. Everything is futile.”

You, indeed, have made my days short in length,
and my life span as nothing in Your sight.
Yes, every mortal man is only a vapor.Selah

Foolishness is tangled up in the heart of a youth;
the rod of discipline will drive it away from him.

General references

“Absolute futility,” says the Teacher.
“Absolute futility. Everything is futile.”