How do we know that Jesus prepares a place for His followers?

In John 14:2-3, Jesus explicitly states, 'In my Father's house are many mansions... if I go and prepare a place for you, I will come again and receive you unto myself.' This not only confirms His intention to prepare a dwelling for His people but also emphasizes that their eternal security and fellowship are guaranteed by His saving work. The assurance of a place in glory comes from the certainty of Christ's redemptive purpose, where His sacrifice secures the entry of believers into the presence of God.