Quote by Tarski, Alfred

"The sentence 'snow is white' is true if and only if snow is white."

"Logic is the study of the principles governing valid inference."

"Truth is a property of sentences, not of the world itself."

"Mathematics is the art of reducing any problem to previously solved problems."

"Perseverance is the key to success."

"Don't give up on what you believe in."

"I've been through worse."

"You learn to live with the pain."