Plato

"The matter is as it is in all other cases: if it is naturally in you to be a good orator, a notable orator you will be when you have acquired knowledge and practice ..."

"... When someone sees a soul disturbed and unable to see something, he won't laugh mindlessly, but he'll take into consideration whether it has come from a brighter life and is dimmed through not having yet become accustomed to the dark or whether it has come from greater ignorance into greater light and is dazzled by the increased brillance."