1. We should observe carefully in order to understand; we should work hard to understand in order to act. ——Romain Rolland

2. If you want to see the truth, pay attention to everything. ——Song Fan

3. Details lie in observation, and success lies in accumulation. ——Emerson

4. Observe, observe, and observe again. ——Pavlov

5. Careful observation of small things is the secret to success in career, art, science and all aspects of life. ——Smile

6. All reasoning must be derived from observation and experiment. ——Galileo