What does the Bible teach about sin and confession?

In Daniel's prayer in chapter 9, he acknowledges the collective sin of Israel, declaring, 'We have sinned' (verse 5). This theme runs throughout Scripture, highlighting that sin is a universal human condition. The recognition of our sinfulness is the first step toward effective confession, which must be accompanied by genuine contrition. God promises forgiveness to those who confess their sins, as noted in 1 John 1:9, which states that if we confess our sins, He is faithful and just to forgive us. Thus, confession is vital not only for receiving mercy but also for restoring our relationship with God, reaffirming our dependence on His grace.