Jesus performed many signs and did many miracles of healing the day before the scribes and Pharisees demanded of him a sign.
He then proceeded to tell them that wicked and adulterous generation seeks after a sign and shall receive none except the sign of the prophet Jonah...definable as the fact that the Son of man would be three days and three nights in the heart of the earth; and rise again from the dead.
But the reason why they would not get a sign is because they would not believe a sign.
For many signs and wonders had already been performed right there in front of them.
As a matter of fact, Jesus had just finished multiplying the loaves and fishes for the second time (Matthew 15:32-16:4).
Circular reasoning, the implied premise of your argument is "continuism is true", to conclude "continuism is true."
Jesus' miracles are impeccable, modern "manifestations" are not. The facts show Jesus' miracles have not continued to manifest themselves in churches today.
It is written:
"We ought to obey God rather than men. (Acts 5:29 NKJ)
God commands we "test the spirits"
Beloved, do not believe every spirit, but
test the spirits, whether they are of God; because many false prophets have gone out into the world. (1 Jn. 4:1 NKJ)
We are commanded to "test whether the supernatural in church is of God", and "hold fast what is good" abstaining from every form of evil:
21 Test all things; hold fast what is good.
22 Abstain from every form of evil. (1 Thess. 5:21-22 NKJ)
God commands all "Examine yourselves" to be certain spiritual experiences are "in the faith"
Examine yourselves as to whether you are in the faith. Test yourselves. (2 Cor. 13:5 NKJ)
A Personal Testimony of "Testing myself":
As a Pentecostal I believed the Holy Spirit would respond to questions with "a leading" that was either "yes" or "no". I believed that 100% for a couple of years.
Over time it became apparent I often went in circles and accomplished nothing for Christ. So I decided to "test" the "leading", I walked to the corner and asked "should I turn left or right?" The "leading" indicated "turn right". So I went left, and as I walked I began to justify why turning right was the correct thing to do, and the "leading" assured me I was right!
That's when I realized it was all experiential delusion, a fabrication of my mind. I confess, at first I was both heartbroken and dismayed, feeling I had lost someone close to me.
But after a while the feeling of liberation became overwhelming, I realized what a slave I was to that "leading". And the "brain fog" that buried my critical thinking skills went away, and I regained my ability to reason soundly.
And it was by a process of sound evaluation on the "fact pattern" surrounding modern "manifestations of the supernatural" that led to my rejection of them and joining the Cessationist side of the issue.
The Bible alone is 100% reliable and true, experiences are subjective and delusionary.