“You must learn from your past mistakes, but not lean on your past successes.”
“Complacency is the mortal enemy of growth and continued success. It is easy to take success for granted and presume that because we have been successful in the past, success will continue to be our friend in the future. Nothing could be further from the truth. The reality is that you have to work harder the more successful you become—your competitors have learned from your success and are all out to beat you.”
Don Soderquist “ The Wal-Mart Way: The Inside Story of the Success of the World's Largest Company https://books.google.com/books?id=mIxwVLXdyjQC&lpg=PR9&dq=Don%20Soderquist&pg=PR9#v=onepage&q=Don%20Soderquist&f=false, Thomas Nelson, April 2005, p. 115.
On working hard
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Don Soderquist 54
1934–2016Related quotes
“To be successful you need friends and to be very successful you need enemies.”
Source: The Other Side of Midnight

As quoted in That Summer in Paris (1963) by Morley Callaghan

“Success on the outside means nothing unless you also have success within.”
Source: The Monk Who Sold His Ferrari: A Fable About Fulfilling Your Dreams Reaching Your Destiny
As quoted in The Subconscious Diet : It's Not What You Put in Your Mouth; It Is What You Put in Your Mind (2005) by Hugh B. Sanders, p. 104 <!-- also quoted in The First Step : A Peek at the Real World (2006) by Gudmundur O. Sigurdarson, p. 41 -->
Context: Success means doing the best we can with what we have. Success is the doing, not the getting — in the trying, not the triumph. Success is a personal standard — reaching for the highest that is in us — becoming all that we can be. If we do our best, we are a success. Success is the maximum utilization of the ability that you have.

On her delivery of long dialogue In the film Sholay, page 1978
MOTHER MAIDEN MISTRESS

[‘Failures are positive steps for success', https://www.deccanherald.com/failures-are-positive-steps-700395.html, Deccan Herald, 28 October 2018]