theory

https://www.marxists.org/reference/archive/stalin/works/1926/11/01.htm#2

"For this very reason, at the same time as he issued his revolutionary April Theses, Lenin issued the slogan for 'patient' propaganda among the masses to convince them of the correctness of those theses. Eight months were spent on that patient work. But they were revolutionary months, which are equal at least to years of ordinary, 'constitutional' times. We won the October Revolution because we were able to distinguish between a correct Party line and recognition of the correctness of the line by the masses. That the oppositionist heroes of 'super-human' leaps cannot and will not understand."

He is saying that Lenin understood that having the right theory is one thing, having popular support for it is another