Negative Mitzvah 168: The High Priest is forbidden to come into contact with any dead body
Leviticus 21:11 "Nor defile himself for his father or for his mother"

The Torah cautions the High Priest to be very careful about coming into contact with a dead body.

Any type of contact is forbidden, whether it be touching or carrying (even without touching) the dead body.

Negative Mitzvah 167 cautions the High Priest not to be under the same roof as a dead body. This Negative Mitzvah cautions the High Priest not to become impure because of other types of contact with dead bodies.

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The scientist's understanding begins from the outside and attempts to work in -- from the bottom up. He begins with subjective empiricism and attempt to deduce an objective picture.

The wisdom of he who knows Torah begins from the inside and works its way out -- from the top down. He meditates upon the Creator's own objective model and applies it to discover the truth behind this world.

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You build a dream house. You start with a dream. The dream becomes a plan. The plan becomes a lot of dirty work. The dirty work becomes a house. If you are successful, it is the house of your dreams. Dream, plan, dirty work, success. Why is this the fundamental strategy of all human endeavor? Because it is the story of the universe. Those who can feel the dream, those who can read the plan, they see we are now at the finishing touches.

From: Bringing Heaven Down to Earth by Tzvi Freeman - tzvif@aol.com