I did it ignorantly in unbelief.

And he did not many mighty works there because of their unbelief.

Unbelief is blind.

There is no strength in unbelief. Even the unbelief of what is false is no source of might. It is the truth shining from behind that gives the strength to disbelieve.

I'm from Missouri; you must show me.

It is better to disbelieve an idea,than to have the spirit of unbelief.