The Gospel is to be preached in conjunction with the demonstration of the power of God.
Just as JESUS showed us.
And yet this does not happen everywhere in Scripture.
Yes, Peter and Paul performed miracles and raised the dead - sometimes. But sometimes they preached without doing these things.
One cannot say to a person " the kingdom of God has come near you if one does not bring the kingdom .
WE can't bring the kingdom, God does that. Jesus taught us to pray, "thy kingdom come"; we wouldn't need to ask God to bring his kingdom if we were responsible for doing so.
Our task is to introduce people to the king. Jesus said "the kingdom of God is within you" - yes, if he is living in someone as king; it is.
A kingdom is the governmental rule and sphere of influencing power.
If there is no power then only a theory of the Gospel is being preached.
The Gospel itself is power., Romans 1:16.
The Gospel contains the Good News that God raised Jesus from the dead by his power and that power can live in us.
Through the power of God people are born again, John 3:3, become new creations, 2 Corinthians 5:17, receive gifts 1 Corinthians 12:28, preach the Gospel and make disciples, Matthew 28:19. Christians have also testified that God's power has enabled them to break bad habits, freed them from addictions and enabled them to do things they would not have thought possible - like going into prisons or onto the mission field to preach. There are many testimonies of non Christians being born again by hearing the Gospel, accepting it and receiving this new life and new heart. Many have been attracted to the Good News, not by a miracle of healing - if someone doesn't want to believe, they can, and will, explain that away - but by seeing love, joy and a changed life in a Christian.
Jesus said that people would know that we are his disciples if we love one another; not when we perform miracles.
How was the lord JESUS verified ? By the signs that followed him .
The message that Jesus brought - God is among you, you can talk to him directly, you can know him personally as your Father and he can live IN you - was new. He demonstrated that his words were true and showed people how much God loved and cared about them by healing them.
But he was persecuted, and almost stoned, not for his miracles but because he claimed to be God, John 10:33.
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We are to become like him.
Yes.
That doesn't necessarily mean performing miracles though. Paul said that the Spirit is transforming us into Jesus' likeness, 2 Corinthians 3:18, not "transforming you so you have the ability to do miracles."
A theological theory remains a theory if it is not put into practice.
And a theory cannot aid a sick and suffering person.
God can heal today; that is a fact and many have testified to that healing.
I believe God heals today, I have received healing - from him, not through a Christian preaching and demonstrating a gift. Many sick people HAVE been helped, and brought to Christ, by prayer, love, being visited and comforted etc. Some have become Christians and been saved without being physically healed.
We must bring the love and govermental influence if power to that person.. It is the loving thing to do.
We must preach the Good News and introduce that person to the God who is love; certainly.
It is also what we are commanded to do .
It is love.
We Can and ARE to do it.
If you believe that you can't show a sick person the love of God without laying hands on them and praying for their cancer to be removed; that's what you must do. As you said though, GOD does the miracle - and he may not. Or at least, not at that particular time. Joni Eareckson had, and has had, many hands laid on her - she is still in a wheelchair, but is making Christ known to thousands.
The cross shows us the love of God; the resurrection shows his power.
A person can accept him as king, be born again and in the kingdom without receivng, or doing, miracles of healing.
Jesus said if your a hearer of the word but not a doer then you decieve yourself.
Another out of context verse which you have quoted to mean what you want it to mean.