Materialist dialectics, a philosophical method for investigating nature and society, holds practical activity to be the basis of our relations with the world and therefore of cognition. Praxis is thus a criterion of knowledge. Only when practical activity confirms the coincidence of ideas and hypotheses with reality can it be said that they are true. Since practical activity is relative to the level of technological development, truth can never be that absolute ardently sought and equally trembled before by the idealists, rather, it is a deepening relative in relation to an absolute which can only ever be theoretical. Lenin wrote:
’From living perception to abstract thought, and from this to practice, such is the dialectical path of the cognition of truth, of the cognition of objective reality. Kant disparages knowledge in order to make way for faith: Hegel exalts knowledge, asserting that knowledge is knowledge of God. The materialist exalts the knowledge of matter, of nature’, V.I.Lenin, Collected Works, Vol., 38 (Philosophical Notebooks), Progress Publishers, Moscow, 1976, 171.