Bunny tries to kill Pascha, but fails.

"It is not experience of life but experience of the Cross
that makes one a worthy hearer of confessions. The most
experienced psychologist or observer of human nature knows
infinitely less of the human heart than the simplest Christian
who lives beneath the Cross of Jesus. The greatest
psychological insight, ability, and experience cannot grasp
this one thing: what sin is. Worldly wisdom knows what
distress and weakness and failure are, but it does not know
the godlessness of men. And so it also does not know that man
is destroyed only by his sin and can be healed only by
forgiveness. Only the Christian knows this. In the presence of
a psychiatrist I can only be a sick man; in the presence of a
Christian brother, I can dare to be a sinner."
  .
.. Dietrich Bonhoeffer (1906-1945), Life Together