“I will not allow myself to be worse than my fellows.”

Source: Confessions of Jean-Jacques Rousseau (1765-1770; published 1782), Book I, I
Context: I have entered on an enterprise which is without precedent, and will have no imitator. I propose to show my fellows a man as nature made him, and this man shall be myself.

Love – That’s All Cary Grant Ever Thinks About (1964)
Context: I used to hide behind the façade that was Cary Grant … I didn’t know if I were Archie Leach, or Cary Grant, and I wasn’t taking any chances. … Another thing I had to cure myself of was the desire for adulation, and the approbation of my fellow man. It started when I was a small boy and played football at school. If I did well they cheered me. If I fumbled I was booed. It became very important to me to be liked. It’s the same in the theater, the applause and the laughter give you courage and the excitement to go on. I thought it was absolutely necessary in order to be happy. Now I know how it can change, just like that. They can be applauding you one moment, and booing you the next. The thing to know is that you have done a good job, then it doesn’t hurt to be criticized. My press agent was very indignant over something written about me not too long ago. “Look,” I told him. “I’ve known this character for many years, and the faults he sees in me are really the faults in himself that he hates.”

Source: Tuesdays with Morrie

Letter X
The Nemesis of Faith (1849)
Context: To suppose that by our disobedience we have taken something away from God, in the loss of which He suffers, for which He requires satisfaction, and that this satisfaction has been made to Him by the cross sacrifice (as if doing wrong were incurring a debt to Him, which somehow must be paid, though it matters not by whom), is so infinitely derogatory to His majesty, to every idea which I can form of His nature, that to believe it in any such sense as this confounds and overwhelms me. In the strength of my own soul, for myself, at least, I would say boldly, rather let me bear the consequences of my own acts myself, even if it be eternal vengeance, and God requires it, than allow the shadow of my sin to fall upon the innocent.

Source: A Theory of Justice (1971; 1975; 1999), Chapter II, Section 17, pg. 103

Attributed to Augustine by many sources on line, but without an actual reference.
Disputed

Georg Alexander von Müller's diary entry (16 September 1914), quoted in Georg Alexander von Müller, The Kaiser and His Court (London: Macdonald, 1961), p. 33
1910s