1. Since man is the servant and interpreter of nature, what he can do and understand is only so much of what he observes about natural processes in fact or in thought. .

From: [British] Bacon: "New Tools"

Introduction: Francis Bacon (1561-1626), 1st Viscount St. Albans (1st Viscount) St Alban, English Renaissance essayist and philosopher.

2. Observation and experimentation of nature are the unique and true methods of science.

From: [UK] Dampier: "History of Science and Its Relationship with Philosophy and Religion"

3. Careful observation is a factor in all great achievements.

From: [British] Spencer: "Education"

Introduction: Herbert Spencer (April 27, 1820 – December 1903) August 8), British philosopher, sociologist, and educator. He is best known as the "Father of Social Darwinism", who proposed a set of theories that applied the evolutionary theory of survival of the fittest to sociology, especially education and class struggle.

4. Observation of nature should be focused, thinking should be profound, and experiments should be precise.

From: [France] Diderot: "Selected Philosophy of Diderot"

Introduction: Denis Diderot (English: Denis Diderot, French: Dini Diderot, 1713 October 5, 1784 - July 31, 1784), French Enlightenment thinker, philosopher, dramatist, writer, representative of the Encyclopedia School, graduated from the University of Paris, France.

5. We have three main methods: observation of nature, thinking and experimenting. Observation collects facts; thinking combines them; experimentation is used to confirm the results of the combination.

From: [France] Diderot: "Selected Philosophy of Diderot"