It is a figurative expression that describes people who guide, help and support students' growth in the process of education.

This phrase refers to the role of a teacher, educator or counselor. Ferry refers to transporting people from one place to another so that they can cross some obstacles or difficulties. In this metaphor, students are faced with the challenge of knowledge and skills acquisition, cognition and development, and need to be experienced, care about the problems and puzzles they encounter during their growth, and provide guidance and support.