Marx's famous saying is engraved on the tombstone of Highgate Cemetery in London: "Philosophers only explain the world in different ways, but the problem is to change the world." A few words, but it contains rich philosophical connotation and profound philosophical wisdom.

This sentence first reveals the practicality of philosophy. Philosophers explain the world in different ways. They study the origin, essence and laws of the world, explore the relationship between people and the world, and try to explain the world in their own way. However, explaining the world is not the ultimate goal of philosophy, and philosophy is more important to change the world.

Secondly, this sentence also reflects the criticism and revolution of philosophy. Philosophers look at the world from a unique perspective, criticize and reflect on existing things and phenomena, and try to find ways to improve and change. This kind of criticism and revolution is particularly prominent in Marxist philosophy.

In addition, this sentence also emphasizes the position of practice in philosophy. Changing the world needs the power of practice. Only through practice can people really change the world. Marx believes that philosophers only explain the world in different ways, while real philosophers should devote themselves to changing the world.

Famous philosophical saying:

Socrates' "unexamined life is not worth living". This sentence shows the importance of philosophy to life. People should look at their own lives and think about their existence and significance.

Descartes' "I think, therefore I am". This sentence is the beginning of modern philosophy, which expresses the importance of thinking for human existence and the pursuit of knowledge and truth.

Kant's "two things make me feel awe, that is, the stars in the sky and the moral principles of people". This sentence shows Kant's reverence for morality and nature, and his view on human reason.

Hegel's "history is a spiritual process, and spirit is free". This sentence expresses Hegel's understanding of history and human freedom. He believes that history is the realization process of freedom, and freedom is the spiritual essence of human beings.

Nietzsche's "God is dead, and now we must become superman ourselves". This sentence shows Nietzsche's rebellion against traditional values. He advocates that human beings should surpass themselves and create new values.