#
"The secret to creativity is knowing how to hide your sources."

#
"The difference between genius and stupidity is that genius has its limits."

#
"Weakness of attitude becomes weakness of character."

#
"Pure mathematics is, in its way, the poetry of logical ideas."

#
"Nature shows us only the tail of the lion. But I do not doubt that the lion belongs to it even though he cannot at once reveal himself because of his enormous size."

#
"Only a life lived for others is a life worthwhile."