Once upon a time when there was no time.

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.

We are just strings of quarks living in a suburb of the local density maximum of the universe.

What cannot be known is more revealing than what can.

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.

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

We can predict the present without having to know everything about the past.