Ecclesiastes 12:13 provides the answer to 6:12's question: after all, the good is to fear God and keep his commandments.

Ecclesiastes 9:6 adds that after death, all earthly involvement ends—echoing the uncertainty and finality of life's shadow.

Ecclesiastes 8:13 uses the same 'shadow' metaphor to describe the wicked's shortened days, reinforcing life's brevity.

Ecclesiastes 8:7 repeats the same frustration — no one knows what will happen, mirroring the question here about the future.

Ecclesiastes 3:22 voices the same existential question — no one can see what comes after them — reinforcing the uncertainty theme.

Ecclesiastes 2:3 shows the same quest — testing pleasure to find what is good — reinforcing the search that 6:12 questions.

In Ecclesiastes 12:8, the refrain 'vanity of vanities' sums up 6:12's 'few futile days' — the book's concluding echo.

In Ecclesiastes 10:14, the exact question from 6:12 reappears — 'who can tell what will come after him?' — reinforcing human ignorance of the future.

In Ecclesiastes 9:9, the same 'vain life' is reoriented toward joyful companionship — offering a practical response to the brevity in 6:12.

In Ecclesiastes 7:15, the same futility is applied to the paradox of righteous perishing and wicked living long — deepening the uncertainty from 6:12.

Ecclesiastes 1:3 poses the foundational question about profit from labor, which underlies the search for what is good in life here.

Ecclesiastes 1:4 contrasts passing generations with the permanent earth, reinforcing the fleeting nature of human days mentioned here.

Psalm 144:4 similarly compares human days to a fleeting shadow, echoing the same image of life's brevity.

James 4:14 echoes life's brevity and uncertainty — a mist that vanishes, just as here life is a shadow and the future unknown.

Micah 6:8 declares that God has shown what is good — justice, mercy, humility — answering Ecclesiastes' rhetorical question directly.

1 Chronicles 29:15 uses the same 'days like a shadow' image, emphasizing human transience and dependency on God.

Psalm 102:11 compares days to an evening shadow that withers, directly echoing Ecclesiastes' shadow metaphor.

Psalm 90:10-12 reflects on life's brevity (seventy years) and urges numbering days, complementing Ecclesiastes' perspective.

Psalm 39:6 describes life as a mere phantom and wealth as meaningless, directly paralleling Ecclesiastes' shadow and futility.

Psalm 17:15 promises satisfaction in God's presence after death, directly countering Ecclesiastes' question about what comes after the shadowy life.

Job 14:2 uses the same shadow metaphor for life's transience, likening it to a flower that withers.

Job 8:9 also compares earthly days to a shadow, highlighting human ignorance and brevity.

Psalm 109:23 also uses a shadow to depict life's fleeting nature — here the psalmist's life is passing like a lengthening shadow.

Psalm 89:47 cries out about life's fleetingness and futility, matching Ecclesiastes' lament.

Psalm 16:5 declares the Lord as one's portion and cup, providing an answer to the unknown good in Ecclesiastes 6:12.

Psalm 4:6 echoes 'Who will show us good?' but with a prayer for God's face, offering hope where Ecclesiastes expresses uncertainty.

Job 7:16 also calls life a breath — a fleeting vapor — similar to the shadow metaphor for life's brevity here.

Psalm 39:5 echoes life's brevity using 'handbreadth' and 'breath', reinforcing the theme of human frailty.

Job 17:7 uses 'shadow' to describe the speaker's wasted frame, paralleling the shadow metaphor for life's transience.

Job 14:21 describes the dead's ignorance of their children's fate — aligning with the question of whether anyone can know what happens after death.

In 1 Corinthians 7:29, Paul's 'the time is short' parallels 6:12's fleeting days — both urge a response to life's brevity.