No one can be born a second time unless he be born first.
 Thomas Aquinas, Summa Theologica (1274). copy citation

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Author Thomas Aquinas
Source Summa Theologica
Topic time
Date 1274
Language English
Reference
Note Translated by Fathers of the English Dominican Province
Weblink http://www.gutenberg.org/cache/epub/19950/pg19950-images.html

Context

“Now sometimes in such cases there is danger of death. Therefore it seems that that part should be baptized, while the child is yet in its mother's womb. On the contrary, Augustine says (Ep. ad Dardan.) : "No one can be born a second time unless he be born first." But Baptism is a spiritual regeneration. Therefore no one should be baptized before he is born from the womb. I answer that, It is essential to Baptism that some part of the body of the person baptized be in some way washed with water, since Baptism is a kind of washing, as stated above” source