Originally Posted by AlienInTheFatherland

Well strangely enough there is a direct train Paris to Berlin, leaving Paris Est early morning and arriving Berlin late evening. You would need to get from CDG into town. It's a 12 hour + trip

And there are trains directly from AMS every two hours changing in Hilversum with direct connection to Berlin. This takes about seven hours

As stated above neither of these is a particularly quick or scenic route - all you would see is a lot of rather flat countryside.