Why is knowing that Jesus died for me important for Christians?

Understanding that Jesus' sacrificial death was for each believer specifically fosters assurance and peace in one's relationship with God. As articulated in John 6:37, Jesus promises to never cast out the one who comes to Him, indicating the personal nature of salvation. When believers realize that Jesus represents them before God and satisfies all divine requirements through His death, they can rejoice in assurance and glorify God for His mercy. This understanding strengthens faith and emphasizes that all glory for salvation belongs to God alone, which is emphasized in 1 Corinthians 1:29, where it's stated that no flesh may glory in God's presence.