“I would prefer even to fail with honor

 than win by cheating.”~Sophocles

It’s better to fail will dignity and honor than to win by cheating and cutting roots to victory. It’s just isn't fair because the others didn’t have the same opportunity like you did. And it just gives you an advantage that they didn’t have weather it be your classmates, siblings, coworkers etc. Even if you do so you won’t be a sour loser because you know you tried your best and gave all you got.