How to pronounce “manna” in English

I feel all warm.So for a guy like me, this is manna, right?

My fourth surprise, actually, as I was telling Richard, resulted from the discovery at the Library of Congress of boxes of letters that either Tesla had written or had beenwritten to him by friends, or colleagues, From a biographer's perspective, this is like manna from heaven.You know, suddenly you get to see this man's voice in real time.