At the risk of seeming ridiculous, let me say that the true revolutionary is guided by a great feeling of love. It is impossible to think of a genuine revolutionary lacking this quality. Perhaps it is one of the great dramas of the leader that he or she must combine a passionate spirit with a cold intelligence and make painful decisions without flinching. Our vanguard revolutionaries must idealize this love of the people, of the most sacred causes, and make it one and indivisible. They cannot descend, with small doses of daily affection, to the level where ordinary people put their love into practice. The leaders of the revolution have children just beginning to talk, who are not learning to call their fathers by name; wives, from whom they have to be separated as part of the general sacrifice of their lives to bring the revolution to its fulfilment; the circle of their friends is limited strictly to the number of fellow revolutionists. There is no life outside of the revolution. In these circumstances one must have a great deal of humanity and a strong sense of justice and truth in order not to fall into extreme dogmatism and cold scholasticism, into isolation from the masses. We must strive every day so that this love of living humanity will be transformed into actual deeds, into acts that serve as examples, as a moving force.

• Man and Socialism in Cuba (1965)

Guevara eventually fell into idealism, which is a large part of why he died in relative isolation at the hands of a Nazi death squad in Bolivia instead of as a nation-builder in Cuba. Prior to his leaving Cuba, you are right.