“There is no avoidance in delay.” 

“They sent forth men to battle, But no such men return; And home, to claim their welcome, Come ashes in an urn” 

“It is in the character of very few men to honor without envy a friend who has prospered.” 

“Tame the savageness of man and make gentle the life of this world.” 

"“Nothing forces us to know What we do not want to know Except pain”"

“My will is mine...I shall not make it soft for you.” 

“The Capitalists will sell us the rope with which we will hang them.” 

“The best way to control the opposition is to lead it ourselves.” 

“Can a nation be free if it oppresses other nations? It cannot.” 

“A lie told often enough becomes the truth.” 

“We are not utopians, we do not “dream” of dispensing at once with all administration, with all subordination. These anarchist dreams, based upon incomprehension of the tasks of the proletarian dictatorship, are totally alien to Marxism, and, as a matter of fact, serve only to postpone the socialist revolution until people are different. No, we want the socialist revolution with people as they are now, with people who cannot dispense with subordination, control, and "foremen and accountants".” 

“Medicine is the keystone of the arch of socialism.” 

“Exchange, fair or unfair,always presupposes and includes the rule of the bourgeoisie.” 

“Communism is Soviet power plus the electrification of the whole country.” 

“But suppose, for the sake of argument, free competition, without any sort of monopoly, would develop capitalism trade more rapidly. Is it not a fact that the more rapidly trade and capitalism develop, the greater is the concentration of production and capital which gives rise to monopoly?” 

“The roots of modern religion are deeply embedded in the social oppression of the working masses.” 

“It is necessary sometimes to take one step backward to take two steps forward.” 

“The departments are shit; decrees are shit.” 

One never notices what has been done; one can only see what remains to be done. 

 Nothing in life is to be feared, it is only to be understood. Now is the time to understand more, so that we may fear less. 

A great discovery does not issue from a scientists brain ready-made, like Minerva springing fully armed from Jupiter’s head; it is the fruit of an accumulation of preliminary work. 

You must never be fearful of what you are doing when it is right

We must not forget that when radium was discovered no one knew that it would prove useful in hospitals. The work was one of pure science. And this is a proof that scientific work must not be considered from the point of view of the direct usefulness of it. It must be done for itself, for the beauty of science, and then there is always the chance that a scientific discovery may become like the radium a benefit for mankind. ”