On "Double Monster", xiphoid and didymus:
Thomas Didymus was one of the twelve disciples. It has
been conjectured that Thomas was the twin brother of Matthew, and was originally
called Jude; and that Jude was the son of James the Less, and therefore grandson
of Alpheus. Some legends make Thomas the twin of James. Thomas whose other name
is Didymus, in Greek "the twin".
another entry:
Didymus the Blind (ca. 313 – ca.398) was an
ecclesiastical writer of Alexandria whose famous catechetical school he led for
about half a century.
Didymus was linked with and condemned with Origen.
However, the doctrine of Origen and Didymus that was found to be the most
"heretical" was not universalism, but the belief in the "Abominable doctrine of
the transmigration of souls.Despite his blindness, Didymus excelled in
scholarship because of his incredible memory. He found ways to help blind people
to read, and experimented with carved wooden letters, a precursor to Braille
systems used by the blind today.Several Orthodox Churches refer to him as St.
Didymus the Blind.[4][5]