„The best age for a guerrilla fighter varies between 25 and 35 years, a stage in which the life of most persons has assumed definite shape. Whoever sets out at that age, abandoning his home, his children, and his entire world must have thought well of his responsibility and reached a firm decision not to retreat a step.“

— Ernesto Che Guevara

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„One might define adulthood as the age at which a person learns that he must die… and accepts his sentence undismayed.“
— Robert A. Heinlein
„All the world's a stage,And all the men and women merely players;They have their exits and their entrances;And one man in his time plays many parts,His acts being seven ages.“
— William Shakespeare
„Age, with his eyes in the back of his head, thinks it wisdom to see the bogs through which he has floundered.“
— Ambrose Bierce
„The guerrilla fighter, who is general of himself, need not die in every battle. He is ready to give his life, but the positive quality of this guerrilla warfare is precisely that each one of the guerrilla fighters is ready to die, not to defend an ideal, but rather to convert it into reality.“
— Ernesto Che Guevara
„You know how much I admire Che Guevara. In fact, I believe that the man was not only an intellectual but also the most complete human being of our age: as a fighter and as a man, as a theoretician who was able to further the cause of revolution by drawing his theories from his personal experience in battle.“
— Jean Paul Sartre