I couldn't do it.

The most I can do is give you a little piece of advice which you won't care for probably.

It's this: Do as you're told to do, Edwards, and do it as hard as you know how! Just as soon as you show Marvin that you are ready to go into the second squad, you'll get there.

And don't get it into your head that Marvin has it in for you or doesn't know what he is doing.
Marvin's a particularly bright young man.

If he wasn't he wouldn't have the third squad to weed out, for that's a job that requires a whole lot more patience and brains than any other job I know of on a football field." Andy paused, and Steve, who was gloomily regarding a scarred knuckle, made no reply.
"Use your head, man," continued the captain in a lighter tone.