Source: Think and Grow Rich: The Landmark Bestseller - Now Revised and Updated for the 21st Century
“Worry less about what other people think about you, and more about what you think about them.”
“Successful people never worry about what others are doing.”
Alleged source in Plato unknown. Earliest occurrence to have been located is a Tweet from 2011 https://twitter.com/ochocinco/status/93332058864238592.
Disputed
Variant: Be more concerned with your character than your reputation, because your character is what you really are, while your reputation is merely what others think you are.
As quoted in "Jamie Chung Reveals The 'Real' (Adorable) Reason She's Marrying Bryan Greenberg" in The Huffington Post (16 May 2014) https://www.huffpost.com/entry/jamie-chung-tj-maxx_n_5325129
Pedagogia do oprimido (Pedagogy of the Oppressed) (1968, English trans. 1970)
A Conversation with Ward Cunningham (2003), To Plan or Not To Plan
Context: To worry about tomorrow is to detract from your work today. Time you spend thinking about tomorrow is time you're not spending thinking about what to do today. The place you leave in the code because you think you'll need it tomorrow, is actually a waste of time today — and a liability tomorrow. It does more harm than good.
“You wouldn't worry so much about what others think of you if you realized how seldom they do.”
