When we try to observe things that are very small, the act of observation itself will significantly disturb the state we are seeking to measure.

There are only certain intervals of time when life of any sort is possible in an expanding universe and we can practise astronomy only during that habitable time interval in cosmic history.

History is full of people who thought they were right -- absolutely right, completely right, without a shadow of a doubt. And because history never seems like history when you are living through it, it is tempting for us to think the same.

There is no reason that the universe should be designed for our convenience.

Some things are as they are regardless of what they were.

We can never know the origins of the universe. The deepest secrets are the ones that keep themselves.

One would normally define a "religion" as a system of ideas that contain statements that cannot be logically or observationally demonstrated... Gödels theorem not only demonstrates that meathematics is a religion, but shows that mathematics is the only religion that proves itself to be one!