“Ah, guilt and sorrow had dogged Juan's footsteps too, for he was not a Catholic who could rise refreshed from the cold bath of confession. Yet the banality stood: that the past was irrevocably past. And conscience had been given man to regret it only in so far as that might change the future. For man, every man, Juan seemed to be telling him, even as Mexico, must ceaselessly struggle upward. What was life but a warfare and a stranger's sojourn?”

“Marco enters a city; he sees someone in a square living a life or an instant that could be his; he could now be in that man's place, if he had stopped in time, long ago; or if, long ago, at a crossroads, instead of taking one road he had taken the opposite one, and after long wandering he had come to be in the place of that man in the square. By now, from that real or hypothetical past of his, he is excluded; he cannot stop; he must go on to another city, where another of his pasts awaits him, or something perhaps that had been a possible future of his and is now someone else's present. Futures not achieved are only branches of the past: dead branches.”

“Man's dearest possession is life. It is given to him but once, and he must live it so as to feel no torturing regrets for wasted years, never know the burning shame of a mean and petty past; so live that, dying, he might say: all my life, all my strength were given to the finest cause in all the world──the fight for the Liberation of Mankind”

“He could not change the man he had been, but these hands would make him the man he could be”

“And Oscar would tell the old man his only regret: that he was living the unremarkable life his parents had always expected from him.”

“You are the only young man that I know of who ignores the fact that the future becomes the present, the present the past, and the past turns into everlasting regret if you don't plan for it.”