What does it mean to be a 'sinful man' in the context of the Bible?

When Peter realizes he is a 'sinful man,' he understands the depth of his depravity in light of who Christ is. This acknowledgment is essential for salvation, as it reflects the biblical truth that all humans are born with a sinful nature, unable to redeem themselves. Recognizing our sinfulness opens the path to repentance and reliance on Christ's righteousness, which is imperative for receiving God's grace. The acknowledgment of being a sinful man is thus not a state of despair, but rather a crucial point of humility from which we can fully receive the grace of God through Jesus Christ.