The single eye
The lamp of the body is the eye. If therefore your eye is sound, your whole body will be full of light.
The word translated "sound" is haplous: single, simple, undivided. An eye that looks at one thing at a time. When attention is single, Jesus says, the whole body fills with light, not the mind only. Awakening is physical. Compare the divided eye: the attention that eats while scrolling and listens while planning. It lets in no light because it never rests anywhere long enough for light to enter. Every practice here is training for the single eye: one breath, one word, one meal, one person in front of you.
Today's practice
Eat one meal today with a single eye: no screen, no book, no conversation. Look at the food. Taste it. Let the body fill with light.
The fast
Nothing after supper; nothing before noon. No sugar today, as an experiment rather than a rule. Watch the afternoon.
By the calendar, today is Day ?.