The whole content of this sentence is: a person's life should be spent like this: when he looks back, he will not regret because he wasted his life, nor will he be ashamed because he accomplished nothing; In this way, on his deathbed, he can say, "My whole life and all my energy have been dedicated to the most magnificent cause in the world-the struggle for the liberation of mankind.
The extended information "How Steel was Tempered" is a novel by the Soviet writer Nikolai ostrovsky, written in 1933.
By narrating Pavel Colta King's growth path, the novel tells people that only by defeating the enemy and himself in the hardships of revolution and linking his pursuit with the interests of the motherland and the people can he create miracles and grow into an iron warrior.