TENACITY : If at first you don't succeed, try, try again. (William E. Hickson: British educational writer, 1803-1870)

TENACITY : Let me tell you the secret that has led me to my goal. My strength lies solely in my tenacity. (Louis Pasteur: French biologist, microbiologist and chemist renowned for his discoveries of the principles of vaccination, microbial fermentation and pasteurization, 1822-1895)

TENACITY : The most difficult thing is the decision to act, the rest is merely tenacity. (Amelia Earhart: U.S. aviation pioneer [the first female aviator to fly solo across the Atlantic Ocean] and author, 1897-1937)