The most significant achievement of Don Bosco was the revolution he brought about in the concept of education. He believed education to be a "matter of the heart" and said that the students must not only be loved, but know that they are loved. While living with youth, teaching them and sharing his life with them, Don Bosco understood the importance of Reason, Kindness and Godliness in dealing with them.He made these three elements the waft and weft of his educational system, commonly known as the Preventive System of Education.
It appeals to the resources of intelligence of the young person. It inculcates in the student an openness to truth and the capacity to grow in responsible freedom.