“Deep within every human being there still lives the anxiety over the possibility of being alone in the world”

1982

"To You on Your First Birthday"
To My Daughters, With Love (1967)
Context: The person who tries to live alone will not succeed as a human being. His heart withers if it does not answer another heart. His mind shrinks away if he hears only the echoes of his own thoughts and finds no other inspiration.

The Inferno (1917), Ch. XIV
Context: We do not die. Each human being is alone in the world. It seems absurd, contradictory to say this, and yet it is so. But there are many human beings like me. No, we cannot say that. In saying that, we set ourselves outside the truth in a kind of abstraction. All we can say is: I am alone.
And that is why we do not die.

School and Fireside (1898) https://archive.org/stream/schoolfireside00maesrich#page/n9/mode/2up
Context: Every human being is a world in miniature. It has its own centre of observation, its own way of forming concepts and of arriving at conclusions, its own degree of sensibility, its own life's work to do, and its own destiny to reach. All these features may be encompassed by general conditions, governed by general laws, and subject to unforeseen influences and incidents, but within the sphere of their own activity, they constitute that great principle which we call individuality.

The Status Of Linguistics As A Science (1929), p. 69 <!-- 1958 edition -->
Context: Human beings do not live in the objective world alone, nor alone in the world of social activity as ordinarily understood, but are very much at the mercy of the particular language which has become the medium of expression for their society. It is quite an illusion to imagine that one adjusts to reality essentially without the use of language and that language is merely an incidental means of solving specific problems of communication or reflection. The fact of the matter is that the "real world" is to a large extent unconsciously built upon the language habits of the group. No two languages are ever sufficiently similar to be considered as representing the same social reality. The worlds in which different societies live are distinct worlds, not merely the same world with different labels attached … We see and hear and otherwise experience very largely as we do because the language habits of our community predispose certain choices of interpretation.

Talks in Europe 1968, 5th Public Talk, Amsterdam, The Netherlands (22 May 1968) Collected Works, Vol. XV
1960s
Context: We need tremendous energy to bring about a psychological change in ourselves as human beings, because we have lived far too long in a world of make-belief, in a world of brutality, violence, despair, anxiety. To live humanly, sanely, one has to change. To bring about a change within oneself and therefore within society, one needs this radical energy, for the individual is not different from society — the society is the individual and the individual is the society. And to bring about a necessary radical, essential change in the structure of society — which is corrupt, which is immoral — there must be change in the human heart and mind. To bring about that change you need great energy and that energy is denied or perverted, or twisted, when you act according to a concept; which is what we do in our daily life. The concept is based on past history, or on some conclusion, so it is not action at all, it is an approximation to a formula. So one asks if there is an action which is not based on an idea, on a conclusion formed by dead things which have been.

My Heart's in the Highlands (1939)

Source: Pretties