I would gladly explain the feeling of happiness which, like now, I have within me from time to time

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.

Franz Kafka, The Diaries of Franz Kafka: 1910-1923