In Hyperion, Holderlin has his protagonist say:
"The great, saying, the one differentiated in itself, of Heraclitus, could only be found by a Greek, for it is the very thing of Beauty and before that there was no philosophy"
Did Heraclitus say this? and given its likely that Holderlin paraphrased for dramatic effect, what is the closest verified saying (or sayings, if Holderlin synthesised them) of Heraclitus to this?
Although its not a part of this question, its worth pointing out that Holderlin idealised Greece, and one can discern the same thought, or an aspect of it in the Tao.