Stoic lessons from baseball

The gist

1. You can't control outcomes or others, only your effort and response, so focus your energy there.
2. Negative visualization, imagining worst-case scenarios in advance, prepares you better than positive thinking alone.
3. Frank Robinson fined himself $200 for not running hard, showing internal standards matter more than external punishment.
4. Ego stops learning by making you think you already know enough, while humility keeps you open to improvement.