If a teacher does not involve himself, his values, his commitments, in the course of discussion, why should the students?

If a teacher does not involve himself, his values, his commitments, in the course of discussion, why should the students?

如果一个老师不把自己、自己的价值观、自己的承诺融入到讨论的过程中，为什么要让学生参与呢?

-- Paul Wellstone 保罗·威尔斯通