Variations exist due to different translations from the original German.
Sidelights on Relativity (1922), translation by GB Jeffrey and W Perrett of "Äther und Relativitätstheorie" (Aether and Relativity Theory), a talk given on at the University of Leiden, and "Geometrie und Erfahrung" (Geometry and Experience), a lecture given at the Prussian Academy published in Sitzungsberichte der Preussischen Akademie der Wissenschaften, 1921 (pt. 123–130 We find precisely among the heretics of all ages men who were inspired by this highest religious experience; often they appeared to their contemporaries as atheists, but sometimes also as saints.
The protocols and practices of dating, and the terms used to describe it, vary considerably from country to country and over time.
While the term has several meanings, the most frequent usage refers to two or more people exploring whether they are romantically or sexually compatible by participating in dates with the other.
Dating as an institution is a relatively recent phenomenon which has mainly emerged in the last few centuries.
From the standpoint of anthropology and sociology, dating is linked with other institutions such as marriage and the family which have also been changing rapidly and which have been subject to many forces, including advances in technology and medicine.