Quotes about Humanity, the Past and the Future

“I know not with what weapons World War III will be fought, but World War IV will be fought with sticks and stones.” – Albert Einstein

“Learn from yesterday, live for today, hope for tomorrow. The important thing is to not stop questioning.” – Albert Einstein

“I never think of the future. It comes soon enough.” – Albert Einstein

“The price of anything is the amount of life you exchange for it.” – Henry David Thoreau