Seneca warns us against ambition, understood not as the will to accomplish things, but as the pursuit of fame, money, and power. Modern politicians should be like Cato the Younger, not Alcibiades.

Seneca advises us to be careful how we spend our time, and especially how we respond to other people's demands for it. Life is short, surely you won't regret, on your deathbed, not having attended one more useless office meeting...

Seneca says that people are like dogs who eagerly await the next tasty morsel from Fortuna, swallow it quickly, then eagerly await the next one. Don't be like a dog, that way lies perennial dissatisfaction with life.

Seneca says that lacking wisdom is like being sick. Although we can imagine what it would be like to be perfectly healthy, in reality we can be happy if we manage to be less sick than before. That's progress, folks!

Epictetus reminds us that one does not become a good carpenter, or pilot, by simply studying the theory of carpentry or piloting. Mindful, repeated effort is needed to see results. The same goes with one's philosophy of life.

Seneca makes the startling claim that philosophy is a lifelong commitment that cannot be indulged only in our spare time. He doesn't mean academic studies, but rather practice, just like a Christian or Buddhist would do it.

Seneca says that he hasn't conquered any enemy but his own greed, ambition, and fear of death. If more people, especially the leaders of the world, were to take that attitude, perhaps there would be no need to conquer enemies.

The goal of Stoic training is to become a better person, not a perfect one. But the first step, as always in life, is to want to make progress. If you wish to better yourself, the game is afoot, you need to start now.

Seneca provides us with a very short and to the point summary of Stoic philosophy: virtue is the only good, it depends on our ability to reason correctly, and it leads to good judgment.

Marcus Aurelius reminds himself to be grateful for the things he has, which he would long for if he didn't have them. At the same time, everything is impermanent, so we should be prepared for our losses.