Students who have attended my [medical] lectures may remember that I try not only to teach them what we know, but also to realise how little this is: in every direction we seem to travel but a very short way before we are brought to a stop; our eyes are opened to see that our path is beset with doubts, and that even our best-made knowledge comes but too soon to an end.
![Students who have attended my [medical] lectures may remember that I try not only to teach them what we know, but also to realise how little this is: in every direction we seem to travel but a very short way before we](http://cdn.quoteddaily.com/images/clifford-allbutt/students-who-have-attended-my-medical-lectures-may-remember-that-i-try-not-only-to-teach-them-what-we-know.jpg)