Introduction
Immediately after offering the goodness of God as the road to repentance (v. 4), Paul names the alternative: every refused invitation deposits wrath in an account that must one day be paid.
Historical Context
Paul uses the language of storing up — a deliberate inversion of the disciple who lays up treasure in heaven (Matthew 6:20). The hardened heart lays up wrath instead.
Original Language Insights
'Treasurest up' (thesaurizo) — to lay up, to accumulate.
'Day of wrath' — eschatological judgment day.
'Righteous judgment' (dikaiokrisia) — judgment that is exactly fair, no leniency unearned.
Theological Significance
Delay is not exemption. Every postponed repentance increases the debt. God's patience is meant to soften the heart; abused, it hardens it further.
Practical Application
If God's kindness has been calling you, today is the day to answer. The account being built up by silence is not one you want presented in full.