Miracles are scaffolding for Weak or Pretend Faith
You can believe or believe you believe.
For religion faith strictly speaking means loyalty to God's ways and what God has revealed. It is more personal than mere belief.
Miracles are events that seem to be against nature or the way natural law usually runs. In other words, they cannot be explained by nature. Examples are the Blessed Virgin Mary appearing to children, the unexplained cure of incurable illness, blood coming out of nowhere on Catholic communion wafers, the sun spinning at Fatima in Portugal in 1917 and most importantly Jesus Christ coming back to life after being dead nearly three days. It is thought that only God can do these things.
It does not matter if you think you need to see miracles
yourself before you are willing to follow God or if you need the evidence of
other people which say they experienced miracles. Your loyalty is shallow.
If Christianity with its philosophy, theology and morality were really credible,
then those who want to back it up with miracles don't show much confidence in
its arguments. The Catholic Church for example boasts how St Thomas Aquinas
found the gospels to be miraculously consistent with the best of philosophical
thinking. God then should give us a stronger interest in philosophy so that he
doesn't need to perform miracles as signs. Some of our inclinations are just
there and cannot be changed much anyway. The miracles are marks of a God who
though he is supposed to be almighty and in control cannot run his universe
properly.
If Jesus did miracles to support the faith then he was using manipulations. He
was doing magic tricks to promote his teachings for he knew his teachings
couldn't stand on their own. It is as if he thought that you need to do miracles
to get people to believe that they should love their neighbour as themselves.
That was a great boost to our faith in ourselves! If you think you can't love
your neighbour then you won't be able to.
If you would advocate something as serious as miracles because your confidence
in the correctness of your religion is weak that is extremism. It is like making
big claims while having little faith in them. Your claims should match the force
of your belief. Any breach of that rule leads to insecurity and bigotry - the
big sister of insecurity.