Albert Einstein was considered a genius.
He was a scientist and humanist responsible for the development of the theory of relativity and photoelectric effect (for which he won the Nobel Prize in 1921)
He is also know for his good language skills - even though it is often said he did not talk till he was about 4 years old - and has left us with many good quotes:
"A person who never made a mistake never tried anything new."
"It is a miracle that curiosity survives formal education."
"Logic will get you from A to B. Imagination will take you everywhere."
"My religion consists of a humble admiration of the illimitable superior spirit who reveals himself in the slight details we are able to perceive with our frail and feeble mind."
"He who can no longer pause to wonder and stand rapt in awe, is as good as dead; his eyes are closed."