A strong light is hostile to the eyes. An intense light will burn and destroy. An immense body of light will vaporize anything, turning molecules to atoms, atoms to particles, particles to energy.
An infinite light, however, knows no bounds. It can go anywhere and enter any place. Nothing can say to infinity, “I cannot bear you! You are too powerful for me!”—for, if so, that would be a limitation on the infinite.
That is the name the Kabbalists call G‑d—the Infinite Light. No place is too small, no moment too insignificant, for the Infinite Light to belong.
Given this fragment of the rebbe:
H' penetrates all places. Not for nothing we call the house in which we live = mikdash katan. To remember that our conduct behind closed doors should be as pristine , as how we behave outside. There is, indeed, no hiding, not even our feelings because H' is aware of that too. So , no deceptions ,or lies, can be hidden. Yes, as humans we are prone to commit errors, but the light there helps to recover and continue our path despite them. Yet, in order to see that light you must build trust every day of your life. How? By remembering the First Commandment of the Shma, and teaching it to our children so that the light emerges always brilliant illuminating our future path.