How do we know repentance is essential for Christians?

Repentance is not merely a suggestion but a command from God, highlighted in Acts 17:30, where it states, 'But now commandeth all men everywhere to repent.' Jesus’ ministry began with the call to repentance and belief in the gospel, indicating its integral role in entering the kingdom of God. Furthermore, Paul exemplified repentance in his letters, recognizing himself as the chief of sinners, yet finding mercy through Christ (1 Timothy 1:15). This emphasizes that acknowledging our sinfulness and turning to God in repentance is not optional, but a vital aspect of our relationship with Him and the experience of His grace in our lives as believers.