"Chop wood, carry water" is a Zen saying. In other words, just do what you are doing, nothing more, nothing less.
As Yoda would say, Simple it is not. Chopping onions, I almost chopped off the tip of my left index finger. I had to wrap my hand in a tea towel and sit down, and reconsider my entire life while the tea towel bloomed red.
Chop onion. That simple directive, the one that is in every cookbook repeated about a thousand times is actually quite complicated. Nowhere does it say, "Be careful and don't chop your finger off, dumbass."
"I'm chopping an onion," is what I say now, when I'm chopping an onion. I have to really concentrate on this. I'm. Chopping. An. Onion. Who is this "I"? What is the action called chopping? And what is an onion? What is this appendage called a finger?
You can go kind of deep, but it's not necessary; what is necessary is half a cup.