People don't need to see miracles to believe.
They had Scripture and those who knew it had its witness to go by.
They could recognize the Messiah that way.
And actually, basing one's faith solely on miracles is a recipe for disaster. The enemy can counterfeit miracles.
the rich man and Lazarus come to mind. When the rich man begged Abraham to send Lazarus back Abraham responded with essentially, *Let them listen to the Law and the Prophets. Even is someone rises from the dead they will not believe if they are not willing to listen to the Law.*
Mary believing without seeing a miracle makes her not any different than millions of others who have placed their faith in Christ without seeing a miracle.
Again... I should have been more specific.
Without a single miracle, sermon, or their accounts in the Gospels.
If Jesus’ miracles and sermons are of such little import... why go to the trouble of documenting and sharing them via Matthew, Mark, Luke & John?