The teacher should be like the conductor in the orchestra, not the trainer in the circus.
You can be an expert any field of study with consistent effort and consistent learning.
I truly am %100 convinced that, if you want to raise knights and noble women, you must teach your children the philosophies of old. I have been teaching my son ancient philosophies since he was nine years old. It becomes a thought pattern, a way of life, an ingrained character. The philosophy of old is the stuff of knights and queens! If I can one day, I will put up a school dedicated to raising young children in the ways of old, from a fresh young age!
I returned, however, with unabated vigour to my work—a more arduous task than anyone can imagine, who has not felt something like the misery of being charged with the care and direction of a set of mischievous, turbulent rebels, whom his utmost exertions cannot bind to their duty; while, at the same time, he is responsible for their conduct to a higher power, who exacts from him what cannot be achieved without the aid of the superior’s more potent authority; which, either from indolence, or the fear of becoming unpopular with the said rebellious gang, the latter refuses to give. I can conceive few situations more harassing than that wherein, however you may long for success, however you may labour to fulfil your duty, your efforts are baffled and set at nought by those beneath you, and unjustly censured and misjudged by those above.