This is a rather special thriller with excellent cast.
Thanks to Pankaj Kamthan for the hint and the transcript:
"The only thing that makes me truly happy is
mathematics, snow, ice, numbers. To me the number system is like human
life. First you have the natural numbers, the ones that are whole and
positive like the numbers of a small child. But human consciousness
expands and the child discovers longing. Do you know the mathematical
expression for longing? Negative numbers. The formalization of the
feeling that you are missing something. Then the child discovers the
in between spaces, between stones, between people, between numbers and
that produces fractions, but it's like a kind of madness, because it
does not even stop there, it never stops. There are numbers that we
can't even begin to comprehend. Mathematics is a vast open landscape.
You head towards the horizon and it's always receding, like
P.S. I just saw that I had the two scenes already in the collection.