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.
It's a little like casting out hundreds of fishing lines into the audience. You start getting little bites, then more, then you hook a few, then more. Then you can start reeling them in and that's a loveliest feeling - the whole audience laughing with you.