In his diary Franz Kafka,

on the 16. December 1910, says:
I won't give up the diary again. I must hold on here, it is the only place I can.
I would gladly explain the feeling of happiness which, like now, I have within me from time to time. It is really something effervescent that fills me completely with a light, pleasant quiver and that persuades me of the existence of abilities of whose non-existence I can convince myself with complete certainty at any moment, even now.

-- there is much to be said about his total dedication to writing. --