“He [Nehru] used to treat me with respect even when he didn't agree with me.”
India Today in: Gulzarilal Nanda: Profile in austerity http://indiatoday.intoday.in/story/at-98-two-time-interim-pm-gulzarilal-nanda-is-the-epitome-of-gandhian-ideals/1/283506.html, India Today, 15 May 1996.
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Gulzarilal Nanda 21
Prime Minister of India 1898–1998Related quotes

“Why would I care whether or not he loved me when he didn't even really know me?”
Source: The Perks of Being a Wallflower

The phrase in French is found in Étienne Blanchard (1941), "Recueil d'idées", p. 76: "Quand je m'approche d'un enfant, il m'inspire deux sentiments: la tendresse pour ce qu'il est, et le respect pour ce qu'il peut être un jour." It doesn't give any reference, just like modern books which include the quote in English.
Disputed

About Abraham Lincoln (1864), as quoted in Reconstruction: America's Unfinished Revolution, 1863-1877 https://books.google.com/books?id=cwVkgrvctCcC&printsec=frontcover&dq=%22Eric+Foner%22+%22Republicans%22&hl=en&sa=X&ved=0ahUKEwiOwdup3aLLAhVK7SYKHZufDmUQ6AEIRjAH#v=onepage&q&f=false, by Eric Foner, p. 6
1860s