Quotes, proverbs, sayings.  Tiny bits of wisdom or platitudes?  Whatever might be the case here are some of my favorite quotes arranged by category:

Life Philosophy

• "The fool doth think he is wise, but the wiseman knows himself to be a fool." –  William Shakespeare
• "Don't take life too seriously. You'll never get out of it alive." – Elbert Hubbard
• “I used to be disgusted, and now I try to be amused." – Elvis Costello
• "Sometimes we put up walls not to keep people out, but to see who cares enough to break them down." – Anonymous
• "Nowadays everybody wanna talk like they got something to say, but nothin comes out when they move their lips, just a buncha gibberish." – Dr. Dre and Eminem
• “Live and let live.” – Proverb

Politics

• "War is the continuation of politics by other means." – Carl von Clausewit
• "In this world nothing can be said to be certain, except death and taxes." – Benjamin Franklin
• "All that is needed for the triumph of evil is the inaction of good men." – Edmund Burke (misattributed)
• "A single death is a tragedy; a million deaths is a statistic." – Joseph Stalin (misattributed)
  
• "Power tends to corrupt, and absolute power corrupts absolutely." – Lord Acton

 Inspirational

• "Our deepest fear is not that we are inadequate. Our deepest fear is that we are powerful beyond measure! It is our Light, not our darkness, that frightens us." – Nelson Mandela (misattributed)
• "'Tis better to have loved and lost than never to have loved at all." – Alfred Tennyson

Poetic

• "My name is Ozymandias, king of kings: Look on my works, ye Mighty, and despair!' – Percy Shelly
• "No man is an island, entire of itself. Each is a piece of the continent, a part of the main. (...) Therefore, send not to know for whom the bell tolls, it tolls for thee." – John Donne
• "There are things in heaven and on earth that are not dreamt of in your philosophy." – William Shakespeare (paraphrased)
• "Good night, sweet prince, and flights of angels sing thee to thy rest!" – William Shakespeare
• "I am become death, destroyer of worlds." - J. Robert Oppenheimer
• “It is a far, far better thing that I do, than I have ever done; it is a far, far better rest that I go to, than I have ever known.” – Charles Dickens
• "It is a riddle, wrapped in a mystery, inside an enigma.” – Winston Churchill