How useless must everything feel to her. For thousands of years... The fillies frolicking under the beautiful sun, growing up, heaving families, ageing and dying... Will she even remember the names of her faithful student and her merry friends? In another thousand years? Will the name of Twilight Sparkle still bring tears to her eyes? In two thousand years?
Even long after the last colorful pony withers away, the sun will continue to rise every day, casting its warm light upon the empty green fields... regardless of how much her thoughts will tear her apart inside.