There should always be a time when every student becomes a teacher, even though he or she may not do so, professionally. The difficulty in the student's transition to teaching is the temptation to forsake learning. Teachers should not forget the pupils' perspective. Students rely on their teachers for motivation, guidance, and correction. They expect their teachers to have a wide knowledge of subjects discussed in classes, but it is impossible for teachers to be so resourceful in they do not seek to learn for themselves. I am convinced that if teachers choose to stop learning, they choose to stop helping their students to do so.
Students are taught to teach. Whether they will end up teaching themselves, their families, small groups at work, young students, or some other audience,
they will be teachers. Likewise, their learning in school is also preparation for ongoing learning throughout life, including their time as teachers. I have always been taught that it is impossible to remember the answer to every question that one is asked, but that the best factor to remember where to look to find the answers.
Everyone, regardless of occupation, needs to be a life-long learner, not only being taught to teach, but learning to learn.