Could you please help me find out who said, "Working hard for something you want is better than wishing for.

I'm sorry. I couldn't find you an author on the internet. I found the quotation on only one webpage, without an author:

Working hard for something you want
is better than wishing for it
http://www.firehotquotes.com/quotes/quotes20.html

Sorry I couldn't be of more help.

For what will it profit a man if he gains the whole world and forfeits his soul? Or what will a man give in exchange for his soul? - The Bible, Matthew 16:26 :: NASB

That Milne quote is great. Loved it.

"Never grow a wishbone where your backbone ought to be."
~ Clementine Padford
http://www.taxi.com/meters0107/outta0107.html

Healing occurs when...
You learn that, for the most part, you get in life what you believe you deserve, and that much of life truly is a self-fulfilling prophecy.
You learn that anything worth achieving is worth working for and that wishing for something to happen is different than working toward making it happen.
More importantly, you learn that in order to achieve success you need direction, discipline and perseverance. You also learn that no one can do it all alone, and that it's OK to risk asking for help.
-- Author Unknown
http://www.energy-medicine-4-health.com/healing.html
http://www.suddenlysenior.com/finallygettingit.html