Full Idea
Plato's conflation of abstract universals with entities of supreme value reinforced the confusion of truth with the most eminent truths. …The only perfect exemplar of a Form is the Form itself, …and only truth itself is completely true.
Gist of Idea
Plato's Forms confused truth with the most eminent truths, so only Truth itself is completely true
Source
Donald Davidson (Truth Rehabilitated [1997], p.3)
Book Reference
Davidson,Donald: 'Truth, Language and History' [OUP 2005], p.3
A Reaction
Even non-subscribers to Plato often talk as if there were some grand thing called the Truth with a capital T, quite often used in a religious context. Truth is the hallmark of successful (non-fanciful) thought.