When it comes to alternate power sources and batteries, Donald R. Sadoway, John F. Elliott Professor of Materials Chemistry at the Massachusetts Institute of Technology (MIT), is the man to turn to. Voted one of Time magazine’s 100 most influential people in the world in 2012, Sadoway is not only known for his packed classes, despite being one of the largest in the history of the institute, but for the pieces of wisdom he imparts when simply speaking about batteries. Here are a few of my favorite Sadoway quotes and what I believe they can teach us about the future of clean energy.