You believe that Jesus was the Son of God; but do you have a personal faith in regard to your own salvation? Do you believe that Jesus is your Saviour? that He died on Calvary’s cross to redeem you? that He has offered you the gift of everlasting life if you believe on Him?
And what is it to believe? It is to fully accept that Jesus Christ died as our sacrifice; that He became the curse for us, took our sins upon Himself, and imputed unto us His own righteousness. Therefore we claim this righteousness of Christ, we believe it, and it is our righteousness. He is our Saviour. He saves us because He said He would.