The closet is the best study. The commentators are good instructors, but the Author Himself is far better.
Once I win, everyone will know who my instructor is in mixed martial arts.
Back in those days intimidation was the greatest tool the drill instructor had. Without that tool, he would not have had control.
The bad news motivated the drill instructors that much more.
The grand instructor, time.
Mistakes are their own instructors
Nature is the best instructor.
An instructor once told me that when there's resistence in your body, it's only because of the resistence in your mind. It's about getting inside the pose. Being the breath.
He who has failed three times sets up as an instructor.
Fear is a great instructor.