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.
John F. KennedyBut Goethe tells us in his greatest poem that Faust lost the liberty of his soul when he said to the passing moment: "Stay, thou art so fair." And our liberty, too, is endangered if we pause for the passing moment, if we rest on our achievements, if we resist the pace of progress. Change is the law of life. And those who look only to the past are certain to miss the future.
John F. Kennedy