We don't always get what we want but with God we always get what we need..
If a child gets the choice to choose between vegetables and candies more than likely that child will choose candies because it's tasty and its what he/she prefers however it is not what's good for him/her...That is where the parent comes in to make sure the child get what is best for them rather that what they want....Same with our heavenly father, he withhold certain things from us because he knows that if we get them they will distract or destroy us...he knows what we need and what is best for us so don't second guess him..."TRUST HIM"