The leading idea which is present in all our [geological] researches, and which accompanies every fresh observation, the sound of which to the ear of the student of Nature seems echoed from every part of her works, is-Time!-Time!-Time!
John McCain's complaint is we're either not at war somewhere, or if we're at war, we leave too soon. So we're not there soon enough, and he wants us to stay forever wherever we send troops.