" Your world is brimming with wonder and mystery. Your thoughts stretch across hundreds of light-years of space and billions of years of time. To you, the Earth is just a speck of dust in the universe. To you, this era is just an instant in time too short to measure. The entire universe seems to exist to satisfy your curiosity and fulfill your existence... I truly envy you. I dreamed of this when I was young, but to enter your world was too difficult. "

― Liu Cixin , To Hold Up the Sky