If you don't set your writing - teaching - at a level that makes them stretch, they are never going to develop their intellectual muscle.
![If you don't set your writing - teaching - at a level that makes them stretch, they are never going to develop their intellectual muscle.](http://cdn.quoteddaily.com/images/m-h-abrams/if-you-dont-set-your-writing---teaching---at-a-level-that-makes-them-stretch-they-are.jpg)
If you don't set your writing - teaching - at a level that makes them stretch, they are never going to develop their intellectual muscle.