...capitalism does live by crises and booms, just as a human being lives by inhaling and exhaling.

Old age is the most unexpected of all things that happen to a man.

The motive force of history is truth and not lies.

Insurrection is an art, and like all arts has its own laws.

The usages and methods of warfare are thus determined by changing circumstances and, therefore, they themselves can in nowise be eternal.

Let a man find himself, in distinction from others, on top of two wheels with a chain - at least in a poor country like Russia - and his vanity begins to swell out like his tires. In America it takes an automobile to produce this effect.

No one revolution up to now has brought all that was expected of it by the masses. Hence the inevitability of a certain disillusionment, of a lowering of the activity of the vanguard, and consequently, of the growing importance of the rearguard. [Joseph] Stalin's faction has raised itself on the wave of reaction against the October revolution.