When human beings live together, conflict is inevitable. War is not.

So long as nuclear weapons continue to exist, so will the temptation to threaten others with overwhelming military force.

A healthy vision of the future is not possible without an accurate knowledge of the past.

We are not merely passive pawns of historical forces; nor are we victims of the past. We can shape and direct history.

As a kid, I was obsessed with space. Well, I was obsessed with nuclear science too, to a point, but before that, I was obsessed with space, and I was really excited about, you know, being an astronaut and designing rockets, which was something that was always exciting to me.

We need to be more conversant with it because science is in our lives. It's in everything. It's in the food we eat. It's in the air we breathe. It's everywhere.

A surprising number of scientific advances have been made and masterpieces of art created by individuals just on the threshold of adulthood.

If we are too friendly to nice, decent bishops, we run the risk of buying into the fiction that there's something virtuous about believing things because of faith rather than because of evidence. We run the risk of betraying scientific enlightenment.