4. Think not of the past or even your current situation. They are beyond your control. But the future is yours to shape.
This is hard because simple it's probably an intentional inexactitude. Both the past and the future are not real. They can't be controlled. The only thing that can be controlled is your inner state of being according to what is going on and it's value that YOU decide.
The Stoic schoools focus on true individuality, being 100% in charge of how you think, act and feel. We can basically only do those three things anyway. We just don't know how.
We get tripped up because we put conditions on our inner state.
- I'll be happy when... (future)- I would be happy if... (future)- I am not happy because... (past)
Instead someone could possibly just recalibrate their perception of what is actually going on and possibly have a reasonably objective view of reality, which may possibly allow one to be free to experience all things with a value you determine.
The future then is something one is "free to experience" instead of being in a state of anxiety around an idea of it being "mine to shape".