What does the Bible say about the remedy for sin?

In John 3:14-16, we see the profound truth that the remedy for sin is found in the sacrificial death of Jesus Christ, referred to as the 'Son of Man' who must be lifted up. This imagery points back to the brazen serpent in Numbers 21, highlighting that just as the Israelites looked to the serpent for healing from snake bites, we must look to Christ's crucifixion for healing from sin. Sin cannot be atoned for through our own righteousness or morality; it requires a substitute, and that substitute is Jesus, who took upon Himself the punishment for the sins of His people.