How do we know that Jesus Christ can cure our heart trouble?

The assurance that Jesus Christ can cure our heart trouble lies in the understanding that He fully satisfies the justice of God as the perfect mediator between God and man. John 14:1 underscores the importance of believing in Christ, as He reveals Himself as the way, the truth, and the life. Through His death on the cross, Christ bore the penalty for our sins, thus reconciling us to God. His righteousness is imputed to those who believe in Him, and it is through faith in Christ that we can find healing for our corrupted hearts. Only by His grace can our hearts be transformed, moving from a state of despair to one of hope and assurance.