In the old world， you devoted 30% of your time to building a great service and 70% of your time to shouting about it. In the new world， that inverts.
"The past is a place of reference, not a place of residence."
Other holidays repose upon the past; Arbor Day proposes for the future.
The light of reason is different from the light of nature.
We choose to go to the moon in this decade and do the other things, not because they are easy, but because they are hard, because that goal will serve to organize and measure the best of our energies and skills, because that challenge is one that we are willing to accept, one we are unwilling to postpone, and one which we intend to win, and the others, too.