Miracles are not the basis of our faith. Miracles may not build our faith. Spending time with Jesus will. Being convinced in our spirit that He is God’s promised Messiah as demonstrated by His resurrection from the dead is faith. If the Spirit has brought that truth to our heart then there is no sign that can add to or take away from our faith. He is Lord of our lives and Lord of the earth. We do not need to see something else to believe that.
“Though he had done so many signs before them, they still did not believe in him.” John 12:37 (ESV)