The reasoning is classic in its clarity. If God does not exist, Kirilov is god. If God does not exist, Kirilov must kill himself. Kirilov must therefore kill himself to become god. That logic is absurd, but it is what is needed.
Why should it be essential to love rarely in order to love much?
Martyrs, my friend, have to choose between being forgotten, mocked or used. As for being understood - never.
The struggle itself towards the heights is enough to fill a man's heart. One must imagine Sisyphus happy.
For if there is a sin against life, it consists perhaps not so much in despairing of life as in hoping for another life and in eluding the implacable grandeur of this life.
A guilty conscience needs to confess. A work of art is a confession.