"Life is like the anvil, the more to be beat, the more able to spark."
"You can not teach people anything, you can only find something to help others."
"Science is not a man of business"
"Truth is not the authority of Mongolia dusty works, but in the universe, nature, this great book without words."
"The world is a book written in mathematical language."
"All reasoning must be obtained from observation and experiment to."