I lose my keys.
There is the pain of having to get someone to come and pick me up and go and get another key made. However, I don’t stop there. I add to this pain with my mind saying: “I am so stupid and careless! How could I have lost my keys? This is terrible!”
The Buddha said: “PAIN IS EXPECTED SUFFERING IS OPTIONAL.” There is the initial event that causes us pain. However, we then like to amplify what has happened. We make up stories about our experiences and our self-worth. Value is not inherent to what we experience, but from what we interpret it to be.
Suffering does not come from the event but what we superimpose on it.