As the head of a winery, I am very frequently asked about terroir. Does the concept really exist? Is it real? Of course it is, I answer, but it’s difficult to understand. But, it has actually helped me to define myself while I strive to better my knowledge of wines. Finding terroir in wine is an existential and personal study, and very rewarding. For me, it sharpens the mind — here your senses are tested along with your memory, as you try to find nuances in a wine, and categorize them. While you sniff and swirl the glass, you are…