Editing Openai/6962e6ea-c100-8008-9813-8d9eab61e749 (section)

=== Assistant: Here’s what I found—and an important attribution note up front: ===
Here’s what I found—and an important attribution note up front:

==== 1) “the Party is the principal leading force within the system of the dictatorship of the proletariat.” ====

This wording (in standard English on Marxists.org) appears in Stalin, not Lenin. In Concerning Questions of Leninism (1926), Stalin writes:

: “The Party is the main guiding force in the system of the dictatorship of the proletariat.” 
: Marxists Internet Archive

==== 2) “The Party’s mission is, without exception, to unify the work of all proletarian mass organizations and to direct their actions toward a single goal—toward the goal of proletarian emancipation.” ====

This wording is also Stalin (same 1926 text). Stalin writes:

: “Its function is to combine the work of all the mass organisations of the proletariat without exception and to direct their activities towards a single goal, the goal of the emancipation of the proletariat.” 
: Marxists Internet Archive

==== Closest Lenin passages expressing the same idea (with Lenin’s own “system / mechanism” language) ====

If what you want is Lenin himself saying the substance behind those lines, these are the most directly relevant:

===== A) Lenin explicitly uses “within the system of the dictatorship of the proletariat… between the Party and the government” =====

From Lenin, “The Trade Unions, The Present Situation and Trotsky’s Mistakes” (Dec. 30, 1920):

: “Within the system of the dictatorship of the proletariat, the trade unions stand… between the Party and the government.” 
: Marxists Internet Archive

Lenin continues immediately with the “vanguard” formulation:

: “What happens is that the Party… absorbs the vanguard of the proletariat, and this vanguard exercises the dictatorship of the proletariat.” 
: Marxists Internet Archive

===== B) Lenin states directly that “under the leadership of the Party, the class dictatorship is exercised” =====

From Lenin, “Left-Wing” Communism: an Infantile Disorder, ch. 6 (1920):

: “...under the leadership of the Party, the class dictatorship is exercised.” 
: Marxists Internet Archive

And, a few lines earlier in the same chapter, Lenin describes the practical reality of Party guidance:

: “No important political or organisational question is decided… without the guidance of the Party’s Central Committee.” 
: Marxists Internet Archive

If you tell me where you saw the two quotations (book/article/Chinese source), I can often trace which edition/translation they came from and whether they were explicitly attributed to Lenin there, or were Lenin-derived lines quoted via Stalin (Problems of Leninism / Concerning Questions of Leninism).