Diogenes Laertius Vitae philosophorum 9.12.114

[114] Hence, when he came to read parts of them to Zopyrus the orator, he would turn over the pages and recite whatever came handy; then, when he was half through, he would discover the piece which he had been looking for in vain, so careless was he. ¹ Furthermore, he was so easy-going that he would readily go without his dinner. They say that once, when he saw Arcesilaus passing through the knaves-market, he said, What business have you to come here, where we are all free men? He was constantly in the habit of quoting, to those who would admit the evidence of the senses when confirmed by the judgement of the mind, the line— Jesting in this fashion was habitual with him. When a man marvelled at everything, he said, Why do you not marvel that we three have but four eyes between us? for in fact he himself had only one eye, as also had his disciple Dioscurides, while the man whom he addressed was normal.