The nature of life on Earth and the search for life elsewhere are two sides of the same question — the search for who we are.

Life can exist on other planets, in other solar systems, in other galaxies and universes.

If there were other people on other planets it would certainly raise theological issues. Further, there is no (zip, zero, nada) scientific evidence of any life of any kind outside of Earth (except maybe angels).

Intelligent life on other planets? I'm not even sure there is on earth!

Life, as it exists on Earth in the form of men, animals and plants, is to be found, let us suppose in a high form in the solar and stellar regions. Rather than think that so many stars and parts of the heavens are uninhabited and that this earth of ours alone is peopled – and that with beings perhaps of an inferior type – we will suppose that in every region there are inhabitants, differing in nature by rank and all owing their origin to God, who is the center and circumference of all stellar regions

All my life I have wondered about the possibility of life elsewhere. What would it be like? Of what would it be made? All living things on our planet are constructed of organic molecules — complex microscopic architectures in which the carbon atom plays a central role. There was once a time before life, when the Earth was barren and utterly desolate. Our world is now overflowing with life. How did it come about? How, in the absence of life, were carbon-based organic molecules made? How did the first living things arise? How did life evolve to produce beings as elaborate and complex as we, able to explore the mystery of our own origins? And on the countless other planets that may circle other suns, is there life also? Is extraterrestrial life, if it exists, based on the same organic molecules as life on Earth? Do the beings of other worlds look much like life on Earth? Or are they stunningly different — other adaptations to other environments? What else is possible? The nature of life on Earth and the search for life elsewhere are two sides of the same question — the search for who we are. In the great dark between the stars there are clouds of gas and dust and organic matter. Dozens of different kinds of organic molecules have been found there by radio telescopes. The abundance of these molecules suggests that the stuff of life is everywhere. Perhaps the origin and evolution of life is, given enough time, a cosmic inevitability. On some of the billions of planets in the Milky Way Galaxy, life may never arise. On others, it may arise and die out, or never evolve beyond its simplest forms. And on some small fraction of worlds there may develop intelligences and civilizations more advanced than our own. Occasionally someone remarks on what a lucky coincidence it is that the Earth is perfectly suitable for life — moderate temperatures, liquid water, oxygen atmosphere, and so on. But this is, at least in part, a confusion of cause and effect. We earthlings are supremely

Even if all life on our planet is destroyed, there must be other life somewhere which we know nothing of. It is impossible that ours is the only world; there must be world after world unseen by us, in some region or dimension that we simply do not percieve.

Even if all life on our planet is destroyed, there must be other life somewhere which we know nothing of. It is impossible that ours is the only world; there must be world after world unseen by us, in some region or dimension that we simply do not perceive. Even though I can't prove that, even though it isn't logical — I believe it.

Life on earth means: the sprouting of wings.

Personally, I don’t think there's intelligent life on other planets. Why should other planets be any different from this one?

Our scientists assert that human life does not exist on such planets as Mars, Venus, Jupiter, etc. This assumption arises out of their ignorance of the etheric levels of matter. Their technology is still inadequate to measure the full range of the material planes. Had they etheric vision, they would know that all the planets of our system are inhabited and that many are far more advanced in evolution than we are on Earth. The time is fast approaching when a more open-minded view of life with its mysteries will supersede the arrogance of the ignorant, to the benefit of us all. (Preface)

... [W]hat is the likelihood that only on ordinary star, the Sun, is accompanied by an inhabited planet? Why should we, tucked away in some forgotten corner of the Cosmos, be so fortunate? To me, it seems far more likely that the universe is brimming over with life. But we humans do not yet know. We are just beginning our explorations. From eight billion light-years away we are hard pressed to find even the cluster in which our Milky Way Galaxy is embedded, much less the Sun or the Earth. The only planet we are sure is inhabited is a tiny speck of rock and metal, shining feebly by reflected sunlight, and at this distance utterly lost.

If there’s life on other planets, then the earth is the Universe’s insane asylum.

As we identify the planets of other stars, as we find other words of roughly the size and mass of Earth, we will scrutinize them for life.