Heidegger has a similar concept, called being-in-the-world (In-der-Welt-Sein) & another concept called historicity (sometimes called facticity)

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This reminded me of something:

فكلمةُ «إنسان» ربّما أصلُها من الأُنس، فالمرءُ يأنَس بغيرِه، والأصلُ بابنِ آدم هو الصحبةُ والرِّفقة، فهو لا يُعرَفُ لذاته، بل يُعَرَّفُ بغَيرِه، ففضائِلُ الفَردِ هي فَضلُه على غيرِه، ومثالِبه هي ما عابَه الناسُ عليها. و"المرءُ على دينِ خليلِه" بل حتى بعَدوِّه يُعَرَّف، فيكونُ صورةً مُعاكسةً منه، ونقيضًا له.

And this is why solitary confinement is considered one of the worst types of torture

- Succession
S4 E9

Your eyes, however, can I not forget: your deep, loving gaze still rests upon me, as it did then … I relived everything and found myself so rich – so rich – because you had given me your heart.

- Louise Ott to Friedrich Nietzsche

Religion arises from fear of nature, morality from fear of human beings.

- Paul Rée

Metaphysical assumptions are passionate errors of self-delusion. Nevertheless, Nietzsche is willing to concede that there might be a metaphysical world as one can hardly dispute the possibility of it. But even if the existence of a metaphysical world were demonstrated, it is certain that knowledge of it would be the most useless of all knowledge: more useless even than the knowledge of the chemical composition of water must be to the sailor in danger of shipwreck.

- I Am Dynamite, A Life Of Friedrich Nietzsche

I want no adherents

- Friedrich Nietzsche

Whoever allows himself to speak in public is obliged also to contradict himself in public, as soon as he changes his opinions.

- Ernst Schmeitzner, Nietzsche's publisher