Who said "War teaches harsh lessons we'd rather not learn."?

This quote is attributed to Indy.

War teaches harsh lessons we'd rather not learn. - Indy

"War teaches harsh lessons we'd rather not learn."

Indy War

"It's not the years, honey, it's the mileage."

"Fortune and glory, kid."

"Snakes. Why'd it have to be snakes?"

"That's how we archaeologists tell time."

"Some battles are worth fighting."

"Sometimes you have to become the monster to stop the monsters."

"Skynet sent me back through time to kill you."

"War teaches us the value of peace."