you're leading into a "you love your family don't you? Well, god is the source of all love, therefore god exists!"
But let me hush and just say yes, I do love my family and friends and the reasons are pretty much the same as hiphop123 said above.
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and and shit
"I have to say that even though I have absolutely no faith whatsoever in humanity in any other area, I have the utmost confidence in our ability to kill shit."