Your comment here reminds me of Lenin's view of dialectical epistemology and human knowledge in general from his notes where he puts it as eloquently as ever:
Dialectics as living, many-sided knowledge (with the number of sides eternally increasing) — with an infinite number of shades of every approach and approximation to reality, with a philosophical system growing into a whole out of each shade — is immeasurably richer than “metaphysical” materialism, whose main problem is its inability to apply dialectics to the Bildertheorie, to the process and development of knowledge.
(...)
Human knowledge is not (or does not follow) a straight line, but a curve, which endlessly approximates a series of circles or a spiral.