die Sphäre
sphere
An area of influence, activity, or interest; an intellectual or social environment.
Politische Entscheidungen gehören nicht in die private Sphäre des Einzelnen.
Political decisions do not belong in an individual's private sphere.

sphere
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sphere
An area of influence, activity, or interest; an intellectual or social environment.
Politische Entscheidungen gehören nicht in die private Sphäre des Einzelnen.
Political decisions do not belong in an individual's private sphere.

'Sphäre' (sphere) is a word used in elevated language. You find it above all in written language, in academic texts, or in formal discussions.
In seiner Rede bewegte sich der Philosoph in rein theoretischen Sphären.
In his speech, the philosopher moved in purely theoretical spheres.
In the meaning 'sphere of influence,' 'Sphäre' (sphere) is very often used in the fixed combinations 'private Sphäre' (private sphere) and 'öffentliche Sphäre' (public sphere). These terms are important in discussions about society and law.
Das Briefgeheimnis schützt die private Sphäre.
The secrecy of correspondence protects the private sphere.
When referring to social classes, 'Sphäre' (sphere) is often used in the plural. Typical phrases are 'in höheren Sphären verkehren' (to move in higher spheres) or 'in andere Sphären aufsteigen' (to rise into other spheres).
Seit seiner Beförderung verkehrt er in den höchsten gesellschaftlichen Sphären.
Since his promotion, he has been moving in the highest social spheres.
The literal meaning 'Kugel' (sphere, ball) is rare today. It now appears almost only in technical contexts such as geometry or astronomy, or in poetic language.
In der Geometrie ist die Sphäre eine perfekt runde Oberfläche.
In geometry, the sphere is a perfectly round surface.
world
'die Welt' and 'die Sphäre' can both mean a particular area of life, work, or thought. 'die Welt' is more suitable for everyday use and often more vivid, for example 'die Welt der Kunst' (the world of art) or 'die Arbeitswelt' (the world of work). 'die Sphäre' sounds more formal and abstract. It fits better when talking about areas of influence, social circles, or an intellectual environment. In normal conversation, 'Welt' is usually more natural, while 'Sphäre' is more common in elevated or factual texts.

In dieser politischen Sphäre spielen persönliche Kontakte eine große Rolle.
In this political sphere, personal contacts play a major role.
Nach dem Praktikum kennt Max die Welt der Krankenpflege viel besser.
After the internship, Max knows the world of nursing much better.