There are no limits to what you can accomplish, when you are supposed to be doing something else.Reveal not every secret you have to a friend, for how can you tell if that friend may hereafter become an enemy. And bring not all mischief you are able to upon an enemy, for he may one day become your friend. Saadi Shirazi, Persian Poet, 13th Century
I’m sure the universe is full of intelligent life. It’s just been too intelligent to come here. Arthur Clarke, Author (2001 – A Space Odyssey, among others)