What does repentance mean in Christian faith?

Repentance is foundational to the Christian faith as emphasized in Matthew 4, where Jesus begins His ministry by calling everyone to 'Repent, for the kingdom of heaven is at hand.' True repentance involves a genuine transformation—a change of heart and mind about sin, resulting in humility, sorrow over wrongdoing, and an active commitment to forsake sinful behaviors. This heart change goes hand in hand with faith in Christ and is essential for salvation. Understanding and embracing repentance can lead to renewal and deeper fellowship with God.