What does the Bible say about Christ's message?

Christ's message, as articulated in the Gospels, particularly in Mark 1:14-15, revolves around the proclamation of the 'gospel of the kingdom of God.' He came preaching good news, which is not just an abstract idea but the very essence of salvation accomplished through His substitutionary death on the cross. By this, He satisfied divine justice and proclaimed that all sins of His people are forgiven. This message is pivotal, as it anchors the hope of the believer not in mere moral effort but in the finished work of Christ, thereby inviting all to repentance and trust in Him for salvation.