How do we know Jesus' mission was to save the lost?

In Mark 10:45, Jesus states, 'For even the Son of Man came not to be ministered unto, but to minister, and to give his life a ransom for many.' This verse underscores the core of His ministry—serving others and ultimately sacrificing Himself for the sins of His people. Throughout the Gospels, Jesus' actions corroborate this mission, as He consistently seeks out the lost, heals the sick, and offers forgiveness and salvation. His encounters, particularly with those marginalized by society, reveal His purpose of salvation, demonstrating that He fulfills the prophecy about the Messiah who comes to save His people from their sins (Matthew 1:21). This establishes a foundational truth in Reformed theology: Christ accomplished redemption for His elect through His atoning death and resurrection.