Where ignorance lurks, so too do the frontiers of discovery and imagination.

Never in all their history have men been able truly to conceive of the world as one: a single sphere, a globe, having the qualities of a globe, a round earth in which all the directions eventually meet, in which there is no center because every point, or none, is center — an equal earth which all men occupy as equals. The airman's earth, if free men make it, will be truly round: a globe in practice, not in theory.

Curious that we spend more time congratulating people who have succeeded than encouraging people who have not.

Where ignorance lurks, so too do the frontiers of discovery and imagination.

Houston, Tranquillity Base here. The Eagle has landed.

I don't know what you could say about a day in which you have seen four beautiful sunsets.