Rambam - Sefer HaMitzvos: Positive Mitzvah 97: Positive Mitzvah 97

Positive Mitzvah 97: Impurity of Creeping Animals
Leviticus 11:29 "These also shall be unclean to you among the creatures that creep upon the earth"

There are eight types of creeping animals listed in the Torah. Contact with their dead bodies makes one impure.

Keep your trust in G-d to yourself. When things don't go so well, tell yourself it is all really for the good, and rejoice in however G-d treats you. But when others come with their troubles, telling them they should rejoice in their afflictions is plain callousness. Cry for them, pray for them, do everything you can for them -- and then you can tell them to trust in G-d.

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A young artist who had suffered several years of depression and inner strife came to the Rebbe and told his story. The Rebbe listened, every minute or so wiping the beads of perspiration from his forehead.

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