Every person is given one body to work with and one still point within it to be consumed. The lamb is the pineal gland, and the true passover is the solar fire of the lower centers rising to meet it and set it alight. Each man takes his own lamb for his own house because the work cannot be borrowed; the house is the individual body, and the offering waits inside each one alone.
The day is appointed, not chosen at random, marking the fixed hour when a person turns the inner flame upward toward the gland that crowns the head.
The lamb: the pineal gland, the quiet inner light consumed by the rising solar fire of awakening.
The house: the individual body, the single dwelling where each person's own offering is kept and made.
10: the number of ordinal completeness and divine order, marking the fixed, appointed point of choosing.