On the seventh (or first) day, he rested and saw that it was good.
Sunday has been a day off from training. I don't want to over-train. Over-training can sound like it implies some herculean effort, but it's surprisingly easy to do if you're not careful. Paying attention to the body, and even imposing some forced days of rest regardless of whether we think we need them, can help us go the distance with our training. After all, this body and mind have to last me for the rest of my life.