On Trinity: They took poetry and made it into a rule.
A reflection by Karl Barth (otherwise not a favourite):
The Word became flesh, and theologians made it words again.
Which reminds me of Paul Ricoeur's definition of Gnosticsim; to make a Symbol concrete again, like The Holy Grail, a Symbol believed by many to be a mere Artefact...
Found on The House of Deputies' and Bishop's List.