Yossarian was stunned by their overbearing vigor and zeal, by their practical, direct efficiency.
They were indeed sending everyone overseas, even Lieutenant Scheisskopf, who had resisted the move with all the vigor and wisdom at his command and who reported for duty at General Peckem’s office in a mood of grave discontent.
There are no more uses of "vigor" in the book.
Show samples from other sources
And we ourselves assembled here today, who are still most of us in the vigor of life, have carried the work of improvement further, and have richly endowed our city with all things, so that she is sufficient for herself both in peace and war.
Thucydides -- Pericles’s Funeral Oration
A group of loudmouthed white-haired old ladies, each trying to talk over the next, a few of them texting, the kind of elderly people who have a baffling amount of energy, so much youthful vigor you had to wonder if they were trying to rub it in.