The miracles come with being empowered by the Holy Spirit through faith, Galatians 3:5, Hebrews 2:4. This is what walk by the Spirit means. If we walk by the Spirit, we would be experiencing all kinds of miracles as apostle Paul did. He received so many revelations (miracles), he had to be buffeted to not become prideful, 2 Corinthians 12:7-10. "And God wroth special miracles by the hands of Paul," Acts 19:11. Our salvation and the Kingdom of God is Power: 1 Corinthians 4:20, Ephesians 6:10, Ephesians 1:19, 2 Timothy 1:7. This Power that these verses is talking about is the Holy Spirit.
We must ask God to fill us up with His Spirit, give us understanding, because some of us don't understand this. We have received the earnest of the Spirit to seal us for our salvation when we first believed, 2 Corinthians 1:22, but we must be "filled up" to walk in His Power. Our inner man has to be strengthened, Ephesians 3:16. The strength here is talking about having an inner man - inner self that's capable of receiving the Power of the Spirit, which is HUMILITY. Then we can experience the miracles that comes ONLY with the Power of the Holy Spirit.