1.
Nothing exists; even if something exists, nothing can be known about it; and even if something can be known about it, knowledge about it can't be communicated to others.
Gorgias
'Nothing is tangible; even if something exists, nothing can be ascertained about it; and even if something can be determined about it, understanding of it cannot be expressed to others.'
2.
Speech is a powerful master and achieves the most divine feats with the smallest and least evident body. It can stop fear, relieve pain, create joy, and increase pity
Gorgias
3.
The effect of speech upon the condition of the soul is comparable to the power of drugs over the nature of bodies. For just as different drugs dispel different secretions from the body, and some bring an end to disease and others to life, so also in the case of speeches, some distress, others delight, some cause fear, others make the hearers bold, and some drug and bewitch the soul with a kind of evil persuasion.
Gorgias
4.
The man who deceives shows more justice than he who does not
Gorgias
5.
Being is unrecognizable unless it manages to seem, and seeming is feeble unless it manages to be.
Gorgias
6.
Men who neglect philosophy while busying themselves with ordinary affairs are like the Suitors [in the Odyssey] who desired Penelope but went to bed with her maids.
Gorgias
7.
I answer, Socrates, that rhetoric is the art of persuasion in courts of law and other assemblies, as I was just now saying, and about the just and unjust.
Gorgias
8.
Man and woman and speech and deed and city and object should be honored with praise if praiseworthy and incur blame if unworthy, for it is an equal error and mistake to blame the praisable and to praise the blamable.
Gorgias