"... and the disciples were first called Christians in Antioch." Acts 11:26

"It is dangerous for anyone to teach who has not first been trained in the 'practical' life. For if someone who owns a ruined house receives guests there, he does them harm because of the dilapidation of his dwelling. It is the same in the case of someone who has not first built an interior dwelling; he causes loss to those who come. By words one may convert them to salvation, but by evil behaviour, one injures them."