Earl Nightingale — American Entertainer born on March 12, 1921, died on March 25, 1989

Earl Nightingale was an American Radio personality, Writer, respected Speaker and Author, dealing mostly on the subjects of Human Character Development, Motivation, Excellence and Meaningful Existence; so named as the "Dean of Personal Development." He was the voice in the early 1950s of Sky King, the hero of a radio adventure series, and was a WGN radio show host from 1950 to 1956. Nightingale was the author of The Strangest Secret, which economist Terry Savage has called One of the great motivational books of all time... (wikipedia)

Nothing can stop the man with the right mental attitude from achieving his goal; nothing on earth can help the man with the wrong mental attitude. Thomas Jefferson
Your attitude is like a box of crayons that color your world. Constantly color your picture gray, and your picture will always be bleak. Try adding some bright colors to the picture by including humor, and your picture begins to lighten up. Allen Klein
Ability is what you're capable of doing. Motivation determines what you do. Attitude determines how well you do it. Lou Holtz
For success, attitude is equally as important as ability. Walter Scott
Develop an attitude of gratitude, and give thanks for everything that happens to you, knowing that every step forward is a step toward achieving something bigger and better than your current situation. Brian Tracy