Quotebunny has 162 quotations by Mark Twain.
“A man cannot be comfortable without his own approval.”
“A man is never more truthful than when he acknowledges himself a liar.”
“A man who carries a cat by the tail learns something he can learn in no other way.”
“A person with a new idea is a crank until the idea succeeds.”
“A round man cannot be expected to fit in a square hole right away. He must have time to modify his shape.”
“Action speaks louder than words but not nearly as often.”
“Advertisements contain the only truths to be relied on in a newspaper.”
“Against the assault of laughter nothing can stand.”
“All generalizations are false, including this one.”
“All you need is ignorance and confidence and the success is sure.”
“Always do right. This will gratify some people and astonish the rest.”
“Anger is an acid that can do more harm to the vessel in which it is stored than to anything on which it is poured.”
“Any emotion, if it is sincere, is involuntary.”
“Apparently there is nothing that cannot happen today.”
“As an example to others, and not that I care for moderation myself, it has always been my rule never to smoke when asleep, and never to refrain from smoking when awake.”
“Be careful about reading health books. You may die of a misprint.”
“Be careless in your dress if you will, but keep a tidy soul.”
“Better a broken promise than none at all.”
“Biographies are but the clothes and buttons of the man. The biography of the man himself cannot be written.”
“But who prays for Satan? Who, in eighteen centuries, has had the common humanity to pray for the one sinner that needed it most?”

Samuel Langhorne Clemens (November 30, 1835 – April 21, 1910), Twain was a friend to presidents, artists, industrialists, and European royalty.
Twain was very popular, and his keen wit and incisive satire earned praise from critics and peers. Upon his death he was lauded as the "greatest American humorist of his age",