The post-modern sensational teaching of the inherited churches, has taken these words to there sensational limits. They ignore the obvious hyperbole and go for the hyper literal. It makes for far more exciting sermons which leads to more money in the plate, but less understanding in the pews.
The ancient prophets did not only delivered verbal soliloquies of the Word of God, but by their seeing, hearing and acting they presented a type for what was to come. Isaiah walked naked for three years. [Is. 20] Jeremiah wearing an ox’s yoke. [Jer. 27] Ezekiel diagramed Jerusalem with a brick or tile. [Ezek. 4] Ezekiel, Zechariah, and John measured the temple.[Ezek. 41-42, Zech. 2:1-13, Rev. 11:1-2]
The two Hebrew words involved in this are signs i.e. ‘ot and wonders i.e. mofetim.
‘ot is Translated as Signs
Then the LORD said to him, “Not so! If any one slays Cain, vengeance shall be taken on him sevenfold.” And the LORD put a mark on Cain, lest any who came upon him should kill him. Gen. 4:15
And God said, “This is the sign of the covenant which I make between me and you and every living creature that is with you, for all future generations: Gen. 9:12
Therefore the Lord himself will give you a sign. Behold, a young woman shall conceive and bear a son, and shall call his name Immanu-el. Is. 7:14