Letter 73 (§3)

“Besides, no man in public life thinks of the many whom he has outstripped; he thinks rather of those by whom he is outstripped. And these men find it less pleasing to see many behind them than annoying to see anyone ahead of them. That is the trouble with every sort of ambition; it does not look back. Nor is it ambition alone that is fickle, but also every sort of craving, because it always begins where it ought to end.”