The act of birth is the first experience of anxiety, and thus the source and prototype of the affect of anxiety.
(Sigmund Freud (1856-1939), Austrian psychiatrist. repr. in Complete Works, vol. 5, eds. James Strachey and Anna Freud (1953). The Interpretation of Dreams, ch. 6, sct. E (1900), footnote added (1909).)
It suggested, too, that the same experience always gives birth to the same sort of belief or religion.
(Henry David Thoreau (1817-1862), U.S. philosopher, author, naturalist. "The Allegash and East Branch" (1864) in The Maine Woods (1864), in The Writings of Henry David Thoreau, vol. 3, p. 201, Houghton Mifflin (1906).)
Hesitation before birth. If there is a transmigration of souls then I am not yet on the bottom rung. My life is a hesitation before birth.
(Franz Kafka (1883-1924), Prague German Jewish author, novelist. Entry January 23, 1922. The Diaries of Franz Kafka 1914-1923, ed. Max Brod, trans. by Martin Greenberg and Hannah Arendt, New York, Schocken Books (1949).)