Lucilius asks about their friend Marcellinus.
Seneca explains that Marcellinus avoids him because he doesn’t want to hear the truth.
And Seneca refuses to lecture someone who has closed his ears.
This is why he doubts the Cynics’ habit of giving advice to everyone indiscriminately —
you can’t cure the deaf.
Some say: “Why not give advice freely? It costs nothing. Someone might benefit.”
Seneca disagrees.
Wisdom is an art, not a lottery.
A good archer doesn’t hope to hit the target by chance — he aims.
Likewise, a wise person chooses whom to help, without giving up too quickly, but also without wasting effort on the hopeless.
Seneca still believes Marcellinus can be saved, but only if helped soon.
He has strong natural character, but it’s drifting toward vice.
Seneca is willing to risk being mocked to help him.
Seneca knows exactly what will happen:
He’ll bring up men like Aristo, who lectured from his carriage, or others who behaved like showmen rather than sages.
Seneca is ready for this.
He’ll endure the jokes — even laugh — if it helps Marcellinus eventually cry for the right reasons.
Seneca doesn’t expect to cure Marcellinus completely.
But if he can:
…that’s already progress.
For the seriously ill, relief is a form of health.
Seneca turns back to Lucilius:
You know where you came from and where you’re going — so keep improving.
Stand firm against fears.
Don’t be intimidated by the number of threats around you.
Only one person can kill you, just as only one person gave you life.
Seneca ends with an Epicurean line:
“I have never wished to cater to the crowd; what I know, they do not approve, and what they approve, I do not know.”
Every philosophical school agrees:
Virtue never pleases the masses.
To win popular applause, you must become like the crowd — and that is always ignoble.
The true benefit of philosophy is that it teaches you to:
If the whole city cheers for you, Seneca says, he pities you —
because he knows what kind of compromises win that kind of applause.