Exploration is in our nature. We began as wanderers, and we are wanderers still. We have lingered long enough on the shores of the cosmic ocean. We are ready at last to set sail for the stars.

Science is a collaborative enterprise, spanning the generations. When it permits us to see the far side of some new horizon, we remember those who prepared the way - seeing for them also.

Science is not only compatible with spirituality; it is a profound source of spirituality.

In the vastness of space and the immensity of time, it is my joy to share a planet and an epoch with Annie.

The cannabis experience has greatly improved my appreciation for art, a subject which I had never much appreciated before.

Books break the shackles of time, proof that humans can work magic.

In college, in the early 1950s, I began to learn a little about how science works, the secrets of its great success, how rigorous the standards of evidence must be if we are really to know something is true, how many false starts and dead ends have plagued human thinking, how our biases can colour our interpretation of evidence, and how often belief systems widely held and supported by the political, religious and academic hierarchies turn out to be not just slightly in error, but grotesquely wrong.