Beliefs about events do. Bad feelings are caused by irrational beliefs, so if you’re feeling negative emotions, focus on the belief you hold about what happens. 

For stoics there is no good or bad, there’s only perception. And you control perception. 

It states that most external events are out of our control and the only thing we can control is our own thoughts and actions.

• If something is inside our control, we can take the necessary action and create the change we desire.
• If it is outside our control, then we can be in...

Stress is largely caused not by other people or external events, but by your reactions to them.