[Utsuro no Hako]

I always liked his afterword to the first Fate/Zero novel:

Originally Posted by Urobuchi Gen

Urobuchi Gen wants to write stories that can warm people's hearts.

Those who knew about my creative history would probably furrow their brows and think this is a cold joke. Actually, I couldn't completely believe it, either. Because when I start typing out words on the keyboard, the stories my brain comes up with are always full of madness and despair.

In fact, I wasn't like this before. I've often written pieces that didn't have a perfect ending, but by the last chapter the protagonist would still possess a belief that 'Although there will be many hardships to come, I still have to hold on'.

But from I don't know when, I can no longer write works like this.

I am full of hatred towards men's so-called happiness, and had to push the characters I poured my heart out to create into the abyss of tragedy.

For all things in the world, if we just leave them alone and pay them no attention, they are bound to advance in a negative direction.

Just like no matter what we do we can't stop the universe from getting colder. It is only a world that is created through a compilation of 'progresses of common sense'; it can never escape the bondage of its physical laws.

Therefore, in order to write a perfect ending for a story you have to twist the laws of cause and effect, reverse black and white, and even possess a power to move in the opposite direction from the rule of the universe. Only a heavenly and chaste soul that can sing carols of praise towards humanity can save the story. To write a story with a perfect ending is a double challenge to the author's body and soul.

Note that he wrote that about five years before Madoka.