"Lastly, we must be holy, because without holiness on earth - we will never be prepared to enjoy Heaven. ...I do not know what others may think - but to me it does seem clear that Heaven would be a miserable place to an unholy man. It cannot be otherwise. People may say in a vague way, that they "hope to go to Heaven, but they do not consider what they say. There must be a certain "fitness for the inheritance of the saints in light."

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There is a point of view among astronomical researchers that is generally referred to as the Principle of Mediocrity. ... If the Sun and its retinue of worlds is only one system among many, then many other systems will be like ours: home to life. Indeed, to the extent that this is true, we should be prepared for the possibility that, even in the Milky Way galaxy, billions of planets may be carpeted by the dirty, nasty business known as life.

— Seth Shostak