What hope should Christians build on?

Christ invites us to build our hope on Him, the solid rock, rather than on the sinking sands of false religion or personal merit. In the metaphor of Matthew 7, the fool builds his house on sand, while the wise man builds on rock—this illustrates the futility of relying on anything other than Christ for security. Our faith is not in our ability to choose or perform; instead, it is in the accomplished work of Jesus on the cross, which secures our place in His eternal kingdom. True hope is anchored in the understanding that our salvation is entirely an act of God's grace, brought forth by Christ's sacrifice, ensuring that we can approach God boldly as His children.