Purpose

In describing G-d’s relationship with creation the Midrash says: The holy one blessed be He, desires a dwelling place in the lowest world. Desire, implies not that the project is unnecessary, rather it is essential to Him.

All resistance to G-dliness comes from un-holiness; through mitzvots we can bring G-dliness even to areas of resistance, and where G-d feels foreign and un-natural He eventually finds a home.

Why were we given the ability to injure or kill? Also, what brings evil into existence and what do we do about it?