From The Obstacle Is The Way by Ryan Holiday:
the most harmful dragon we chase is the one that makes us think we can change things that are simply not ours to change. That someone decided not to fund your company, this isn’t up to you. But the decision to refine and improve your pitch? That is. That someone stole your idea or got to it first? No. To pivot, improve it, or fight for what’s yours? Yes.
Focusing exclusively on what is in our power magnifies and enhances our power. But every ounce of energy directed at things we can’t actually influence is wasted—self-indulgent and self-destructive.
I have that down as the “best book for tough times” in my list of best business books for online entrepreneurs 📚