1. We must learn! We must understand, understand the world, and understand ourselves! ——[Germany] Beschier's "Learning Song"

Introduction Beschier, a German poet, was born in Munich on May 22, 1891. His father is a senior judge. He studied medicine, literature and philosophy in Berlin, Munich and Jena. He published works as early as college and participated in editing "Action" magazine in 1912. He opposed World War I, supported the Russian October Revolution, and was an active member of the Spartak Regiment.

2. The ignorant is not free, because facing him is a strange world. ——[Germany] Hegel's "Aesthetics"

Introduction Georg Wilhelm Friedrich Hegel was slightly later than Kant and was one of the representatives of German idealist philosophy in the 19th century. one. Hegel's thought marked the peak of the German idealist philosophical movement in the 19th century and had a profound impact on later philosophical schools, such as existentialism and Marx's historical materialism.

3. Cunning people despise knowledge, fools envy knowledge, but smart people are good at using knowledge. ——[English] Bacon's "On the Pursuit of Knowledge"

Introduction to Francis Bacon, 1st Viscount St. Albans, an English Renaissance essayist and philosopher. A British materialist philosopher, the founder of experimental science, the founder of modern induction, and a pioneer in logically organizing scientific research procedures. His major works include "New Tools", "On the Advancement of Science" and "The Great Revival of Academics".

4. Reading is a kind of enjoyment, and creation, despite all its troubles, is still a great enjoyment. ——[Sweden] Strindberg's "The Maid's Son"

Introduction to August Strindberg (1849-1912), a Swedish writer, the founder of modern Swedish literature, and a Swedish National treasure, the father of modern drama in the world. In 1867 he was admitted to Uppsala University. He began writing plays while in college. Among them, the play "The Exile", which reflected the religious conflict between a father and his daughter during the Icelandic mythology period, was praised by King Carl XV.

5. Everyone, even the most outstanding genius, must be difficult and ignorant in some areas of knowledge. ——[Germany] Schopenhauer "The Pain Between Will and Life"

Introduction to Arthur Schopenhauer (February 22, 1788 - September 21, 1860, aged 72) , a famous German philosopher. He was the first person in the history of philosophy to openly oppose rationalist philosophy and pioneered irrationalist philosophy. He was also one of the founders and main representatives of voluntarism, believing that the will to life is the force that dominates the operation of the world.