Quote That Isn't There

The quote read well enough: "e;The final test of freedom is this: can you remain the same person in praise, in insult, in gain and in loss?"e; It sounded like Seneca. It felt like Seneca. For years I carried it. Then I went looking for the source.It does not exist in his writings. Not in the letters, not in the treatises, not in any standard edition. The line is a modern invention that attached it...