By the time I was in sixth grade I could bound every country in the world from memory.

You have to have hope. Otherwise, I don't think you could handle it. Of course, you have to have both luck and pluck to make it.

A person that much interested in science is going to neglect his social life somewhat, but not completely, because that isn't healthy either. So one has to work it out according to one's own inclinations, how one wants to proportion these things.

I think there's a supreme power behind the whole thing, an intelligence. Look at all of the instincts of nature, both animals and plants, the very ingenious ways they survive. If you cut yourself, you don't have to think about it.

Young man, I am afraid you are wasting your time. If there were any more planets they would have been found long before this.

How does a pansy, for example, select the ingredients from soil to get the right colors for the flower? Now there's a great miracle. I think there's a supreme power behind all of this. I see it in nature.

I used to think about how nice it would be to visit the planets. Of course, I didn't expect to see in my lifetime what has happened. I knew it would happen some day, but it came along faster than I at first thought.