1. "Cogito, ergo sum." - René Descartes
This famous quote translates to "I think, therefore I am," and is Descartes' way of proving his own existence through the process of doubting everything else.
2. "The unexamined life is not worth living." - Socrates
Socrates believed that a life without self-reflection and introspection was a hollow one, lacking in meaning and purpose.
3. "All that is necessary for evil to triumph is for good men to do nothing." - Edmund Burke
Burke believed that it was the duty of moral individuals to stand up against injustice and fight for what was right.
4. "The only true wisdom is in knowing you know nothing." - Socrates
Socrates believed that humility was the key to true intelligence and wise decision-making.
5. "I am not a Athenian or a Greek, but a citizen of the world." - Diogenes
Diogenes was a proponent of cosmopolitanism, or the belief that all humans should be considered equal regardless of nationality or ethnicity.
6. "All theory, dear friend, is gray, but the golden tree of life springs ever green." - Johann Wolfgang von Goethe
Goethe believed that while theories and concepts were important, they must be balanced with practices and experiences.
7. "A man's true wealth is the good he does in the world." - Muhammad Ali
Beyond his successes in the boxing ring, Muhammad Ali believed that true wealth and success came from making positive contributions to society.
8. "To be yourself in a world that is constantly trying to make you something else is the greatest accomplishment." - Ralph Waldo Emerson
Emerson believed that personal authenticity was the ultimate goal in life, even in the face of societal pressures to conform.