More quotes by Mark Twain

"Courage is resistance to fear, mastery of fear - not absence of fear."
"Everything human is pathetic. The secret source of humor itself is not joy but sorrow. There is no humor in heaven."
"If you pick up a starving dog and make him prosperous he will not bite you. This is the principal difference between a dog and man."
"Wrinkles should merely indicate where the smiles have been."
"No man's life, liberty, or property are safe while the legislature is in session."