The dog still needs walking on the day you’re exhausted. That’s what a commitment actually is.

A commitment only becomes visible on the days you do not feel like it. Anybody will walk the dog when the weather is good and the day went well; the dog still needs walking when you are flattened, and that evening is where the word starts to mean something. Hard days are not interruptions to a commitment, they are the test of it. Nothing more is being asked of you than to go.

When you are exhausted, shrink the thing rather than skipping it. A shorter walk, ten minutes of practice, half the reading. Keeping the chain unbroken matters more than the size of the link.