you see the effects of drinking when a man is drunk making a fool out of himself. you see the effects of drugs when people lose all morality and act dazed, you see the effects of music when people fall into a trance, so see the effect of love in an unlawful manner when people worship their loved ones above Allah, and when Allah takes away their loved one, the pain cant be explained, this is just another intoxication of dunya... you do something bad, then expect something bad in return !