After his second stroke in December 1922, Lenin wrote a testament.
This letter was to be read to the Party Congress after his death.
Lenin's testament warned that Stalin had become too powerful and he could not be trusted to use his power wisely.
Stalin's rudeness towards Lenin's wife contributed to the negative way Lenin wrote about him.
The testament was critical of the other leading Bolsheviks.
Zinoviev and Kamenev were criticised for their opposition to seizing power in October 1917.
Trotsky was criticised for initially not being a Bolshevi,.
Bukharin was criticised as his "theoretical views can be classified as fully Marxist only with the great reserve."
The Testament was suppressed, along with his opponents underestimating Stalin and seeing him as being useful to defeat what they considered to be more significant opponents.