2. Spare that spider

Don't spare the spiders which are our friends for we get protection from them.

1. Spiders are our friends for destroying insects which may be human beings' greatest enemies.

2. Spiders as a kind of insect-eaters are better than other kinds of insect-eaters, because:

a. spiders kill insects much more than any other.
b. never do at the least harm to humans.

3. Spiders are not insects.

4. A large number of spiders work in killing insects on our behalf and kill vast insects.