Diogenes F6 (from Simplicius Physics152.21-153.13)

And yet all things live, see and hear though the same thing; and they derive every other part of their mind from that very source.

 

ὅμως δὲ πάντα τῶι αὐτῶι καὶ ζῆι καὶ ὁρᾶι καὶ ἀκούει, καὶ τὴν ἄλλην νόησιν ἔχει ἀπὸ αὐτοῦ πάντα

Zeno (Aristotle, Metaphysics, Β 4.1001 b7)

 

 

[Zeno said that] “That which does not make something bigger or smaller when it is added or taken away is not real.”

 

ὃ γὰρ  µήτε προστιθέµενον µήτε ἀφαιρούµενον ποιεῖ µεῖζον

µηδὲ ἔλαττον, οὔ φησιν εἶναι τοῦτο τῶν ὄντων

 

From Zeno of Elea, a student of Parmenides.  Famous for paradoxes (he even appears as an interlocutor for Socrates in Plato’s Parmenides).

(Not the Zeno who founded Stoicism)