So faith comes from what is heard, and what is heard comes through the message about Christ.
Through the word of God; whether heard or read, we learn of the Father, the Son, and the Holy Spirit. We learn of the love Jesus has for us, the eternal gift of Salvation He gave us, His grace, and His mercy. We learn of how Jesus died for us, was buried, and defeated death and rose to sit as the Great King over us all. Through the immersion in the word of our Lord we find our life, we find our salvation.
Trust in the word of the Lord, have faith in the message of the greatness of our Lord and Saviour!