Knowledge = Miracle ??

Can someone tell me about the connection between "knowledge" and "miracle"???

On last thursday, my religion teacher explain to me about the people who got the title as a saint based on the DVD he showed in his laptop/notebook..

The DVD tell us that only a people who can show a miracle could to be called a "saint"..
example ;
Leprosy disease was kind of dangerous infection that if someone got this disease, he would die not even longer..But in facts, there is someone who cared about this problem and show their interest by serving the ill ones..At last, they got the title as a "saint"..Is it a miracle??

The other facts, from 25 January 1873 until today, from the invention of doctor Amuer Hansen until the research of modernized technology, we know that there is a medicine to cure this disease..Is it a miracle or a knowledge??

Can we call the finder of this disease's medicine as a "saint"??

Please everyone who read this blog to answer my Question above..
Your opinion would be greatly appreciated..