Both tears and sweat are salty, but they render a different result. Tears will get you sympathy; sweat will get you change.
“I love my work with a frenetic and perverse love, as an ascetic loves the hair shirt which scratches his belly.”
“If my acceptance of the office of Governor would serve my country, though my administration would be attended with the loss of personal credit and reputation, I would cheerfully undertake it.”