"Don't confuse fame with success. Madonna is one; Helen Keller is the other."

confuse (verb): identify (something) wrongly
confuse something with something different (verb): think that something is something different
fame (noun): celebrity; being known by many people
success (noun): reaching a great goal; important accomplishment
Madonna (noun): (1958-) an American singer and actress
Helen Keller (noun): (1880-1968) an American author, political activist and lecturer; and the first deaf-blind person to earn a Bachelor of Arts degree