Should we assume then that any pastor, Preacher or Evangelist who does not follow up with miracles is not from God?
That’s an interesting question.
I’d say that . . .
Given Mark 16:16-18 . . .
That if some of those signs don’t follow a man or woman of God EVER . . . then they are either not in right standing with God or are living far below their inheritance and calling in God . . . and thereby achieving far less for The Kingdom than they might otherwise be accomplishing by His Grace and giftings.
. . . or perhaps God has them in a long dark night of the soul . . .
or . . . a desert experience . . . or some sort of mysterious period of being on a sabbatical or “on the shelf” for whatever reason.
No, because the signs and wonders were to confirm the words the Apostles were preaching just as the Old Testament prophets were enabled by God. Now that we have the completed revelation from God - the Holy Scriptures - God-breathed and God confirmed truth is available to all. Any person who preaches and teaches the truths of the Christian faith HAS the Bible as their authority and all who would seek to know the truth should judge the truthfulness of anyone by what Scripture says. The Bible is the authority now and all doctrine must be measured by what it says.