All good actors are very bright. You can't be stupid and a good actor. You may be inarticulate, you may not be highly educated, but all good actors are quick-witted, some of them dazzlingly so. All you do is guide them.
“I don't think that there are very many good writers who don't live without a sense of tension. If they haven't got one immediately available to them, then they usually manage to manufacture it in their private lives.”
“Heart and head are the constituent parts of character; temperament has almost nothing to do with it, and, therefore, character is dependent upon education, and is susceptible of being corrected and improved.”