“Unfortunately, all life on earth - the only life we know - represents, for all its current variety, the results of a single experiment, for every earthly species evolved from the common ancestry of a single origin. We desperately need a repetition of the experiment (several would be better, but let's not be greedy!) in order to make a judgement. Mars represents our first real hope for a second experiment - the sine qua non”

“All life is an experiment. The more experiments you make the better.”

“Good judgement is the result of experience and experience the result of bad judgement.”

“There is within the limits of our experience no reason to seek the causes of these adaptations in a greater whole. All organisms are designed only for life upon the earth. The state of the earth's crust accordingly contains all (external) reasons of its arrangement. …They are peculiar (individual). According to all that experience teaches we must assume that they are not repeated on other heavenly bodies.”

“We live together, we act on, and react to, one another; but always and in all circumstances we are by ourselves. The martyrs go hand in hand into the arena; they are crucified alone. Embraced, the lovers desperately try to fuse their insulated ecstasies into a single self-transcendence; in vain. By its very nature every embodied spirit is doomed to suffer and enjoy in solitude. Sensations, feelings, insights, fancies — all these are private and, except through symbols and at second hand, incommunicable. We can pool information about experiences, but never the experiences themselves. From family to nation, every human group is a society of island universes.”

“Do not be too timid and squeamish about your actions. All life is an experiment. The more experiments you make the better.”

“And what constitutes evil, real evil, is the taking of a single human life. Whether a man would die tomorrow or the day after or eventually… it doesn't matter. Because if God does not exist, then life… every second of it… Is all we have.”

“That, at any rate, is the theory of our Constitution. It is an experiment, as all life is an experiment.”

“For us, beings of the present, there is never a single experience that is completely authentic. There is always some form of repetition of the previous experience. Even if something is new, it will soon become old and outdated.”

“I feel like you kind of have to live life to its fullest in order to be a good actor. Draw on experiences. The more experiences the better, and I really have had a lot of experiences in life, even at my young age.”