What’s within my control? Only my opinion when receiving data input from the universe.
Of existing things, God has placed some within our power, and others not within our power. Within our power he has placed the most important thing, that through which he himself is happy, the power to deal with impressions. For when that capacity is rightly exercised, there is freedom, serenity, cheerfulness, constancy, and there is justice, too, and law, and self-control, and virtue in its entirety.
Epictetus, Fragments, 4.