Quotes by Joseph Dietzgen

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The awareness of the relative validity of our knowledge is the most powerful lever of progress. The conception of those who believe in absolute truth is but a monotonous scheme of honest men and rational institutions. They oppose, for this reason, all human and historical forms that do not fit into their norm and that reality nevertheless produces without regard to their minds...

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Absolute truth is the root cause of intolerance. From the consciousness of the reduced validity of "eternal truths" results, conversely, tolerance. The understanding of pure reason, that is, the knowledge of the general dependence of the spirit, is the way of truth to practical reason.