Perhaps some quotes on discipline would help? I hope so because that's all I could come up with.

Discipline gives charm to the game of life. In football, if players can do anything, neither offside nor penalty, then it will be a meaningless game, incapable of giving joy.
-Sathya Sai Baba
Discipline is the soul of an army.
-George Washington
I've never known a man worth his salt who in the long run, deep down in his heart, didn't appreciate the grind, the discipline. There is something good in men that really yearns for discipline.
-Vince Lombardi
Talent without discipline is like an octopus on roller skates. There's plenty of movement, but you never know if it's going to be forward, backwards, or sideways.
-H. Jackson Brown, Jr.
If we don't discipline ourselves, the world will do it for us.
-William Feather
Lack of discipline leads to frustration and self-loathing.
-Marie Chapian
I hope these might be of some help to you. Good luck with the presentations! And Welcome to Quoteland!
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Speak when you are angry and you will make the best speech you will ever regret.-Ambrose Bierce