It is a curious thing: man, the centre and creator of all science, is the only object which our science has not yet succeeded in including in a homogeneous representation of the universe. We know the history of his bones, but no ordered place has yet been found in nature for his reflective intelligence.

I think that man has a fundamental obligation to extract from himself and from the earth all that it can give; and this obligation is all the more imperative that we are absolutely ignorant of what limits - they may still be very distant - God has imposed on our natural understanding and power.

Progressively saved by the machine from the anxieties that bound his hands and mind to material toil, relieved of a large part of his work and compelled to an ever-increasing speed of action by the devices which his intelligence cannot help ceaselessly creating and perfecting, man is about to find himself abruptly plunged into idleness.

Religion and science are the two conjugated faces or phases of one and the same complete act of knowledge - the only one which can embrace the past and future of evolution and so contemplate, measure and fulfil them.

Science is the practice of failing repeatedly but learning as you go.

I am aware of the usefulness of science to society and of the benefits society derives from it.

There is good science you can do in space. There is stuff there you cannot do on Earth and we can gain understanding from it.

I used to read science fiction a lot, and I still like science fiction when it is a model of how we really are and to see ourselves from another perspective.