Both tears and sweat are salty, but they render a different result. Tears will get you sympathy; sweat will get you change.
“There's no question that California, in the last three or four years, has been privileged to add disproportionately to the economic growth of America, and to contribute to its technological productivity.”
“Sometime in the future - 25, 50, 75 years hence - what will the situation be like then? By that time the Chinese will have the capability of delivery too.”