I strongly believe that missionaries make better products. They care more. For a missionary， it's not just about the business. There has to be a business， and the business has to make sense， but that's not why you do it. You do it because you have something meaningful that motivates you.

Every building is a prototype. No two are alike.

"In observational studies, we often have to rely on assumptions that are not directly testable."

"It's important to write about difficult subjects in a way that children can understand."