"An eye for an eye makes the whole world blind."
- Mahatma Gandhi
"When people talk, listen completely. Most people never listen."
- Ernest Hemingway
"Whoever undertakes to set himself up as a judge of truth and knowledge is shipwrecked by the laughter of the Gods."
- Albert Einstein
"Iron rusts from disuse, stagnant water loses its purity, and in cold weather become frozen: even so does inaction sap the vigors of the mind."
- Leonardo da Vinci