Jesus himself explained very clearly in
John 5: 36 ...For the works that the Father has given me to accomplish, the very works that I am doing, bear witness about me that the Father has sent me.
John 14:11 Believe me that I am in the Father and the Father is in me, or else believe on account of the works themselves.Jesus wanted to look at the work that He has done. The good work, such as the feeding of thousands, healing of all kinds, and even resurrection of the dead and His dead on the cross and the resurrection. For the work, even without the resurrection, believe that Jesus is an honest and powerful man and then believe his claim that He is the Son of God. A good and honest man does not lie. Jesus' dead on the cross was because of the claim that He was God, a truth that he could not lie or deny. For that, He had to die on the cross. There is no magic here. Just follow the simple logic of reasoning.
Finally, have you considered that it is not your faith that work the miracle but the faithfulness of God's Words. Our faith in a fantasy will not make the fantasy comes true. We believe in God's Word because it really works. Our faith is evidence based and hence it is easy, real and effective. There is nothing mystical and don't make salvation too hard. Just believe that Jesus is who he said he is from the works that he did.