I have been scientifically studying the traits and dispositions of the "lower animals" (so-called,) and contrasting them with the traits and dispositions of man. I find the result profoundly humiliating to me. For it obliges me to renounce my allegiance to the Darwinian theory of the Ascent of Man from the Lower Animals; since it now seems plain to me that that theory ought to be vacated in favor of a new and truer one, this new and truer one to be named the Descent of Man from the Higher Animals.
Mark TwainEvolution is the law of policies: Darwin said it, Socrates endorsed it, Cuvier proved it and established it for all time in his paper on The Survival of the Fittest. These are illustrious names, this is a mighty doctrine: nothing can ever remove it from its firm base, nothing dissolve it, but evolution.
Mark TwainWhat God lacks is convictions- stability of character. He ought to be a Presbyterian or a Catholic or something- not try to be everything.
Mark TwainNations do not think, they only feel. They get their feelings at second hand through their temperaments, not their brains. A nation can be brought -- by force of circumstances, not argument -- to reconcile itself to any kind of government or religion that can be devised; in time it will fit itself to the required conditions; later it will prefer them and will fiercely fight for them.
Mark TwainThere is nothing so annoying as to have two people talking when you're busy interrupting.
Mark TwainAll you need in this life is ignorance and confidence; then success is sure. You can "already know for sure" things that could actually impede progress. Always be on the lookout for the things you did not know, that you did not know. Secondly, work on strengthening personal belief that a particular will be achieved regardless of any adversity that may show up, or evidence to the contrary.
Mark Twain