Wine is forbidden for a Muslim here on earth:
See also Sura 2:219.
On the other hand in Paradise are rivers of wine:
Surely the pious will be in bliss ...
their thirst will be slaked with pure wine sealed.
-- Sura 83:22,25
Is wine good or bad? Are we forbidden on earth something that is truly good? Or in Paradise are we not only allowed it, but even provided in overflowing measures (rivers of ...) something that is so bad that it is called "Satan's handiwork"?
Some Muslims attempt to explain away the discrepancy by appealing to the following passage:
Save single-minded slaves of Allah; For them there is a known provision, Fruits. And they will be honoured In the Gardens of delight, On couches facing one another; A cup from a gushing spring is brought round for them, White, delicious to the drinkers, Wherein there is no headache nor are they made mad thereby. And with them are those of modest gaze, with lovely eyes, (Pure) as they were hidden eggs (of the ostrich). S. 37:40-49 Pickthall
The heavenly wine, it is claimed, which believers will drink will not cause headaches or madness, thereby justifying Allah's decision to permit it in paradise.
The main problem with citing this is that the passage nowhere identifies this drink as wine. It does not even mention either the word wine or strong drinks/intoxicants. It simply says that believers will drink from a cup something which is white in color which does not cause headiness. If anything, one can make an argument that this drink is actually milk. After all, the Quran does mention the fact that believers will be given rivers of milk, and milk is indeed white:
A similitude of the Garden which those who keep their duty (to Allah) are promised: Therein are rivers of water unpolluted, and rivers of milk whereof the flavour changeth not, and rivers of wine delicious to the drinkers, and rivers of clear-run honey; therein for them is every kind of fruit, with pardon from their Lord. (Are those who enjoy all this) like those who are immortal in the Fire and are given boiling water to drink so that it teareth their bowels? S. 47:15 Pickthall
One can even argue that the reason the passage emphasizes that this particular drink doesn't cause headiness is to distinguish it from the wine which believers will have access to when in paradise. In other words, the qualification presupposes that this drink is different from the wine which believers will be drinking since, unlike wine, this specific drink doesn't cause madness or headaches. Putting it in another way, the passage is not identifying this drink as wine, but is actually contrasting it to wine by highlighting the point that it doesn't have the common affects associated with intoxicants.
Further reading: The Quranic Teaching on Wine and Strong Drink
Contradictions in the Qur'an
Answering Islam Home Page