 faith is the substance of things unseen. To a chemist, there is a substance there and you can see it and name it and analyze what elements from the periodic table compose it and what percentages. But I'm kneeling before the Eucharist and I'm like to the priest afterwards I'm like you want me just to look at that bread and wine and in a timeless instant that we can't even measure as a nano or a femtosecond or anything like that. In some timeless instant, knowing the atoms and electrons aren't doing anything different it's just continuing by all accounts of the best analytical tools in chemistry to continuing to be what it is bread and wine. I'm just supposed to believe at that moment of consecration that Jesus Christ who lived and died and knows me from 2000 years ago is here with us in the room. You want me just to look at that knowing nothing happens and say yep Jesus is here and you know the priest is like that is what we believe.