Nope. That's not a typo. The war of art is the battle you will face whenever you choose to do something worthwhile. It's the forces of the universe pushing against you, because the resistance that you face is what is going to make you stronger, and the powers that be know that.
How many times have you procrastinated doing something, only to finally do it and everything went wrong? I went to the gym for the first time in a few months and it was a disaster. The traffic was terrible, I got to the gym and forget socks, the app that I was going to use to track my workout wouldn't work, I forgot my water...just one thing after another.
Whenever you choose to do something worth while, you will find resistance. But that's when you know that you've chosen well. If you make it through that short battle, you will end up having done something great, however small.