"Even if astrology had been a real science, I knew nothing about it. We find countless events in real history which would never have occurred if they had not been predicted. This is because we are the authors of our so-called destiny, and all the 'antecedent necessities' of the Stoics are chimerical; the argument which proves the power of destiny seems strong only because it is sophistical. Cicero laughed at it. Someone whom he had invited to dinner, who had promised to go, and who had not appeared, wrote to him that since he had not gone it was evident that he had not been iturus ('going to go'). Cicero answers him: Veni ergo cras, et veni etiamsi venturus non sis ('Then come tomorrow, and come even if you are not going to come'). At this date, when I am conscious that I rely entirely on my common sense, I owe this explanation to my reader, despite the axiom, Fata viam inveniunt ('Destiny finds the way'). If the fatalists are obliged by their own philosophy to consider the concatenation of all events necessary, a parte ante ('a priori'), what remains of man's moral freedom is nothing; and in that case he can neither earn merit nor incur guilt. I cannot in conscience admit that I am a machine."