In both Christianity and Islam, the divine garden is a sacred motif: all the senses are stimulated and there is order and peace. But what if you can't visit the garden? What if the gates to heaven remain closed to you?! How can someone inside enjoy all that splendor if they know that the gate remains closed to others?
It is a dilemma of inclusivity and exclusivity. You always belong to a group, but not everyone belongs to the group that is well off or you want to belong to, and for some, the grass is always greener on the other side. So there is also a second dilemma: comparison.
Does Paradise have multiple gardens? If so, would some be more pleasant and beautiful than others? This garden ...