“There are no walls at the edge of this universe...absence of gravity is the limit of space existence.”

“Smartass Disciple: Master, where is exactly the edge of this universe ?Master of Stupidity: Edge is wherever the absence of universal gravity.”

“Smartass Disciple: Master, tell me what is it beyond this universe ?Master of Stupidity: No 'space' in no 'gravity'. No 'thing' in spaceless.”

“If we presume that the boundary of the universe is a kind of surrounding wall,then we think like ancestors who thought there's abyss at the edge of flat earth.”

“No whereto in the absence of space.”

“Heaven is space in universe that has unique laws of nature.”

“Send a solid idea to beyond this universe!A neighbour universe will soon be existed.”