[ found this wonderful, revolutionary-optimism book of workers' philosophy published 1971 in Beijing. heavy on the Mao Tsetong Thought, of course ]
"The bus runs straight ahead but the situation is always changing; there is struggle between two kinds of outlook in holding the steering-wheel. Only by living study and application of Mao Tsetung Thought, doing a good job of ideological revolutionization and putting politics in command of technique, can we victoriously advance in all weathers."
"always bear class struggle in mind, use vehicles as an instrument for class struggle and see to it that driving is in the interests of consolidating the dictatorship of the proletariat"