Deuteronomy 28:1-14 lists some of the blessings we could expect for obeying the laws of God. When Jesus ministered on earth, He made it clear; obeying the law was beyond our ability. He said things like, "If your hand causes you to sin, cut it off" (Mark 9:43). He said these things to express the value of obeying the laws of God and the extremes we would have to take to accomplish it.
When God gave Israel the commandments, He also gave them an avenue of grace. They could achieve right standing by offering animal sacrifices. These were to be performed twice daily as well as annually for special ordinances such as Passover and the Day of Atonement. This was a way for God to forgive them of their sins so He could bless them.
In Mark 11, Jesus tells teaches the disciples that faith can move mountains---but there is a catch. Verse 25 reads, "And whenever you stand praying, if you have anything against anyone, forgive him, that your Father in heaven may also forgive you your trespasses." Jesus was still ministering under the Law Covenant. In order for God to move into our situations and perform miracles for us, He needs an avenue of forgiveness.
When Jesus ministered on the earth, He was 100% human. Yet He went about healing the sick and performing miracles. Since He did not need forgiveness because He had no-sin (1), God was able to perform miracles through Him. Jesus walked the earth as a human who was of the Holy Spirit (2).
Once you receive God's gift of forgiveness, you are born of the Holy Spirit (3). When this happens, you receive the gift of His righteousness (1). Since it is a gift, you just receive it and there are no other requirements. The Bible says in 1 John 2:12, "... your sins are forgiven you for His name's sake."
When you are born-again, the avenue God needs to perform miracles in your life has been created. This means the blessings of Deuteronomy 28 now belong to you. It also means you are equipped with the Holy Spirit to perform healing and miracles. Expect the blessings---expect to see miracles. God is in you, waiting to be released.
(1) For He made Him who knew no sin to be sin for us, that we might become the righteousness of God in Him. 2 Corinthians 5:21
(2) And the angel answered and said to her, "The Holy Spirit will come upon you, and the power of the Highest will overshadow you; therefore, also, that Holy One who is to be born will be called the Son of God. Luke 1:35
(3) Jesus answered and said to him, "Most assuredly, I say to you, unless one is born again, he cannot see the kingdom of God." Nicodemus said to Him, "How can a man be born when he is old? Can he enter a second time into his mother's womb and be born?" Jesus answered, "Most assuredly, I say to you, unless one is born of water and the Spirit, he cannot enter the kingdom of God. John 3:3-5