How do we know the doctrine of Christ's love for His own is true?

Scripture affirms Christ’s love for His elect, as seen in the passages that speak of His sacrificial death and His promise to cleanse them from sin. In John 13:1, it is said that having loved His own, He loved them to the end. This implies an everlasting love that transcends temporal boundaries. Furthermore, the doctrine is validated through the experience of believers who recognize the transformative power of Christ's love in their lives, evidenced in their relationship with Him and the assurance of their salvation.