What's the best thing a teacher has ever said to you?

For my first ever pre-tertiary essay for year 11, the topic being What do you regard as the elements of ‘being religious’ or ‘thinking religiously’? And what do you regard as the common characteristics of religious traditions? my teacher had written a comment below my marks. The last sentence read “I am much better informed from reading your work!”. I was shell-shocked.

So what’s the best/nicest/most shocking (in a good way) thing a teacher has ever said to you?