The expectation of and experience of miraculous activity is very often linked, in Scripture, to the presence of belief/faith as regards the person of Jesus Christ.
Matthew and Mark both record a visit that Jesus made to His home country of Nazareth. Both accounts have Jesus teaching in the synagogue there. Both accounts have the people of Nazareth astonished at Jesus' teaching and wondering where the teachings and "mighty works" come from:
And when he was come into his own country, he taught them in their synagogue, insomuch that they were astonished, and said, Whence hath this man this wisdom, and these mighty works? - Matthew 13:54
And when the sabbath day was come, he began to teach in the synagogue: and many hearing him were astonished, saying, From whence hath this man these things? and what wisdom is this which is given unto him, that even such mighty works are wrought by his hands? - Mark 6:2
Some of the "mighty works" mentioned in both accounts may have come to the people of Nazareth by hearsay as both accounts indicate that Jesus did not do many "mighty works" in Nazareth; Matthew says Jesus did not many and Mark says He could not do any, except.
Mark does indicate that Jesus healed "a few sick folks" while in Nazareth but makes it somewhat unclear whether such healings are distinct from or constitute "mighty works":
And he could there do no mighty work, save that he laid his hands upon a few sick folk, and healed them.
Matthew indicates that Jesus did not do "many" mighty works:
And he did not many mighty works there because of their unbelief.
What is clear in both accounts is that the people of Nazareth were offended in or at Him because they could not reconcile his teachings and works with what they understood as His origins:
Is not this the carpenter's son? is not his mother called Mary? and his brethren, James, and Joses, and Simon, and Judas? And his sisters, are they not all with us? Whence then hath this man all these things? - Matthew 13:55-56
Is not this the carpenter, the son of Mary, the brother of James, and Joses, and of Juda, and Simon? and are not his sisters here with us? And they were offended at him. - Mark 6:3
What is also clear, in both accounts, is that the reason Jesus did not or could not perform many "mighty works" in Nazareth was the unbelief of the people there. In Mark Jesus marvelled at their unbelief and in Matthew unbelief is plainly stated as the reason not many "mighty works" were done:
And he marvelled because of their unbelief.
And he did not many mighty works there because of their unbelief.
Whereas He should have been honored as a prophet because of His teachings and His works, Jesus did not do many "mighty works" in Nazareth because the people there refused to recognize Him as more than a mere man; the son of a carpenter, the son of Mary, sibling to many, and known by them.
But Jesus, said unto them, A prophet is not without honour, but in his own country, and among his own kin, and in his own house.
This answer is in no way given to suggest that bolstering one's faith or manifesting faith to some degree or in a particular fashion can produce or intensify miracles. It is also not given to suggest that persons who experience no "mighty works" are unsaved or somehow less than those who do. Nor does it necessarily prove that miracles do or do not occur after the apostolic age.
- There is also significant evidence in Scripture that inordinate focus upon the miraculous is fertile ground for deception by those appearing as "angels of light" and Paul's correction of the Corinthian church shows us that it is also fertile ground for disharmony (to say the least) within the Church.
It does however demonstrate that, during Jesus' ministry on earth, the miraculous works of Jesus were often directly/causally linked to the presence of accurate (not necessarily complete in content) belief/faith in who Jesus Christ is:
And he said unto her, Daughter, thy faith hath made thee whole; go in peace, and be whole of thy plague. - Mark 5:34
I personally know people who have been physically healed through faith and others who have strong faith despite remaining unhealed. Jesus healed many but did not heal everyone who came in contact with Him and I see no biblical basis to require one or the other.