What assurance do Christians have about eternal life?

The assurance of eternal life for Christians is rooted in the promises of Jesus, specifically in John 6:40, where He states that everyone who looks to the Son and believes in Him will have eternal life. This assurance is based on the understanding that Christ will not lose any of those given to Him by the Father. Furthermore, His authority and power guarantee that He will raise them up at the last day, affirming that their salvation is secure and their eternal destiny with Him is guaranteed. This provides comfort and hope to believers as they navigate life's challenges.