„Every revolution was first a thought in one man’s mind and when the same thought occurs in another man, it is the key to that era.“

— Ralph Waldo Emerson
„But what man does out of despair, is not necessarily a key to his character. I have always thought that the real key is in that which he seeks for his enjoyment.“
— Ayn Rand
„Of all the thoughts that rise in the mind, the thought 'I' is the first thought.“
— Ramana Maharshi
„Every man's life ends the same way. It is only the details of how he lived and how he died that distinguish one man from another.“
— Ernest Hemingway
„Leninism is Marxism of the era of imperialism and the proletarian revolution. To be more exact, Leninism is the theory and tactics of the proletarian revolution in general, the theory and tactics of the dictatorship of the proletariat in particular. Marx and Engels pursued their activities in the pre-revolutionary period (we have the proletarian revolution in mind), when developed imperialism did not yet exist, in the period of the proletarians' preparation for revolution, in the period when the proletarian revolution was not yet an immediate practical inevitability. But Lenin, the disciple of Marx and Engels, pursued his activities in the period of developed imperialism, in the period of the unfolding proletarian revolution, when the proletarian revolution had already triumphed in one country, had smashed bourgeois democracy and had ushered in the era of proletarian democracy, the era of the Soviets.“
— Joseph Stalin
„Have you noticed that the imbecile always smiles? Man's first frown is the first touch of God on his forehead. The touch of thought.“
— Ayn Rand