Vladimir Ilyich Ulyanov, better known as Vladimir Lenin, was a Russian revolutionary, leader of the Russian Social Democratic Labour Party (Bolsheviks), statesman and political theorist. After the October Revolution he served as the first and founding head of government of Soviet Russia from 1917 until his death in 1924 and of the Soviet Union from 1922 until his death in 1924.
Lenin's third take-down of the Trotsky-Bukharin positions on the trade union question, in which he exposes both their tendencies towards factionalism and bureaucratic attitudes concerning the proletariat, as well as their general lack of knowledge of dialectics. Aside from the fact that Lenin makes some of his most strident attacks on factionalism and bureaucracy here, he also gives a good explanation of dialectics in quite an unexpected work.
"Dialectical logic demands that we should go further. Firstly, if we are to have a true knowledge of an object we must look at and examine all its facets, its connections and “mediacies”. That is something we cannot ever hope to achieve completely, but the rule of comprehensiveness is a safeguard against mistakes and rigidity. Secondly, dialectical logic requires that an object should be taken in development, in change, in 'self-movement' (as Hegel sometimes puts it). This is not immediately obvious in respect of such an object as a tumbler, but it, too, is in flux, and this holds especially true for its purpose, use and connection with the surrounding world. Thirdly, a full 'definition' of an object must include the whole of human experience, both as a criterion of truth and a practical indicator of its connection with human wants. Fourthly, dialectical logic holds that 'truth is always concrete, never abstract,' as the late Plekhanov liked to say after Hegel."