What does it mean to have faith in Christ?

Having faith in the atonement of Christ is the main reason we are engaged in the gospel and should be the core of our individual testimonies. In his book, "Believing Christ," Stephen E. Robinson states, “We often think that having faith in Christ means believing in his identity as the Son of God and the Savior of the world. But believing in Jesus’ identity as the Christ is only half of it. The other half is believing in his ability, in his power to cleanse and to save – to make unworthy sons and daughters worthy. Not only must we believe that he is who he says he is, we must also believe that he can do what he says he can do. We must not only believe in Christ, we must also believe Christ when he says he can clean us and make us celestial.”