Why is there pain, evil, and suffering in this world?
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For God so loved the world, that he gave his only begotten Son, that whosoever believeth in him should not perish, but have everlasting life. For God sent not his Son into the world to condemn the world; but that the world through him might be saved.
-John 3:16-17
But all these things will they do unto you for my name's sake, because they know not him that sent me.
(John 15:21)
Be sober, be vigilant; because your adversary the devil, as a roaring lion, walketh about, seeking whom he may devour:
(1 Peter 5:8)