Can punishment for unintentional sins be reconciled with Christians knowing they have eternal life?

My question isn't so much about reconciling specific Scripture passages as it is about reconciling two teachings supported by Scripture, so I'm asking here rather than on Hermeneutics. I'm wondering how to reconcile these two thoughts: 1. Christians can know they have eternal life (1 John 5:13; 2 Tim. 4:7-8), so much so that they can be excited for Jesus's return rather than fearful (Heb. 9:28; 1 Thess. 5:2-5; Rev. 22:20). 2. Those who sin, even unknowingly, are still guilty (Leviticus 5:17; Matthew 15:14; Luke 12:48) and are "poisoned by bitterness and bound by iniquity" until they repent and pray for forgiveness (Acts 8:20-24, NKJV; c.f. 1 John 1:9). When Jesus comes, if I can still be punished for things I've done without knowing they're sinful (Luke 12:48) and am "poisoned by bitterness and bound by iniquity" (Acts 8:23, NKJV) until I discover the sin and repent, then how can I know I "**have [present tense]** eternal life" (1 John 5:13, NKJV, emphasis added), so much so that I can be excited for Jesus' return (Heb. 9:28; 1 Thess. 5:2-5; Rev. 22:20)? Instead, wouldn't I lack certainty as to whether I have eternal life? Also, if sins of ignorance can condemn, shouldn't I hope Jesus' coming will delay so that I can study as long as possible to learn of any sins I need to repent of? How are the two thoughts bulleted above reconcilable? I'd like the range of acceptable answers to be broad, but if I must limit answers to that of a group, I'll choose answers considered orthodox within Christianity. If you'd like to list multiple possible ways to reconcile the two thoughts, that's fine as well. My main desire is for answers consistent with the Scriptures I presented.