We need good teachers, the best we can have: teachers who are knowledgeable and who can explain knowledge; teachers who can keep abreast of the new technologies and innovative trends in educational psychology and teaching, and who respect the ethical code of the teaching profession. But experience tells us that the good teachers we need do more than this. All of us remember at least one teacher who did not so much pass through our life, as stay in it. She or he made certain things impossible to erase from our minds and hearts through typically human, simple and beautiful gestures. These teachers showed us that education can be a wonderful, humanising adventure, a true event of human transformation. This paper makes proposals about how to help trainees teachers do this.