Jesus went about to do good and to destroy the works of the devil.
"How God anointed Jesus of Nazareth with the Holy Spirit and with power, who went about doing good and healing all who were oppressed by the devil, for God was with Him. "
(Acts 10:38 NKJV)
While Jesus Christ was in this world He healed the sick and destroyed all the works of the enemy.
"He who sins is of the devil, for the devil has sinned from the beginning. For this purpose the Son of God was manifested, that He might destroy the works of the devil." (I John 3:8 NKJV)
Our real enemy is the devil. Jesus came to destroy satan's works. Satan brings sicknesses and destruction in our lives. Jesus was anointed by God with the Holy Spirit and with power and He did good and healed or freed all who were in the clutches of the devil. Jesus said, "The thief does not come except to steal, and to kill, and to destroy. I have come that they may have life, and that they may have it more abundantly." (John 10:10 NKJV). Jesus came so that we could have abundant life, so that we could lead holy life, prosperous life, healthy life and a free life. If we believe in Jesus, we too can live fulfilling lives. If we get anointed with the Holy Spirit we have God's power working in us and we can serve others better and be better disciples.
Now Jesus is no longer in this earth. Instead He has given us authority to heal the sick and to destroy all the works of the enemy, when we use His name and lay hands on the sick, they get healed. We can deliver people from demonic power by using the name of Jesus.
"And these signs will follow those who believe: In My name they will cast out demons; they will speak with new tongues; they will take up serpents; and if they drink anything deadly, it will by no means hurt them; they will lay hands on the sick, and they will recover.” (Mark 16:17-18 NKJV)
When we are anointed with the Holy Spirit, we get the power to do what Jesus did and even greater works. “Most assuredly, I say to you, he who believes in Me, the works that I do he will do also; and greater works than these he will do, because I go to My Father. (John 14:12 NKJV)
This happened because when Jesus reached heaven He sent the Holy Spirit to be with us forever.