I thought that I never really liked those ideas of the fanarts or fanfics that showed Celestia and Luna being daughters of the royalty and being raised with all the luxuries that entails that, I don't like royalty or its supposed divine origin, I like to believe that a king (or a princess in this case) must know what it is to suffer and to know the sufferings suffered by his people; also remembering that before there was Equestria, the three tribes were separated and they hated each other, that's how I thought: How would they reacted? ponies with prejudiced and hatred in their hearts when they saw a different pony, at the present time she had been cheerfully received for incarnating the three tribes like one, but thousands of years ago everything was different. And so this idea was born, my vision of Celestia's chilhood.

-bigsnusnu