Aristotle said of God that even if we cannot learn much about him, still we ought to spend as much time as we can learning what we can.
And ought not to listen to those who counsel us "O man, think as man should" and "O mortal, remember your mortality". Rather ought we, so far as in us lies, to put on immortality and to leave nothing unattempted in the effort to live in conformity with the highest thing within us. Small in bulk it may be, yet in power and preciousness it transcends all the rest. (Aristotle, The Ethics. Chapter 7, p. 305).
The highest things require our attentive efforts no matter how satisfied we be with what is less than than the highest.
To be a student requieres a certain amount of faith in oneself, a certain self-insight that makes a persona realize that he can learn something that seems unlearnable in the beginning. Also, to quote Augustine, students should "consider within themselves whether what has been explained has been said truly".
On the other hand, teaching is an act of humility, as is learning. It is the realization that the highest things, of which we possess but the beginnings, are to be known, can be known by each of us in our own selves, and none of us in the less in the learning.
Secretly speaking, there are no uneducated men. They may escape the trivial examinations, but not the tremendous examination of existence. The dependency of infancy, the enjoyment of animals, the love of women and the fear of death –these are more frightful and more fixed than all conceivable forms of the cultivation of the mind. It is idle to complain of schools and colleges being trivial. Schools and colleges most always be trivial. In no case will a college ever teach the important things. For before a man is twenty, he has always learned the important things. He was learned them right or wrong, and he has learned them all alone.
(G. K. Chesterton. A Chesterton Anthology, p. 344)