If you saw a single door [on its own], from what normally comprises a pair [of doors], with a protruding attachment, would you ever imagine that this [single door with a protrusion] was created in such a way without purpose? Rather you would certainly know that it was made in such a way to pair and providing a purpose for the protrusion]. So you would expose the other component in order to unite it [with the first one] and hence reach a useful purpose. In the same way you find a male animal as if he is part of a pair equipped for its female partner, and they unite in order to procreate and preserve [the human race]. So destroyed, defeated and wretched are the claimants of philosophy How did their hearts get blinded from this wonderful creation so as to deny the organization and purpose in it?'