Full Idea
Wherever there is contradiction, the comical is also present. ...The tragic is the suffering contradiction, the comical is the painless contradiction.
Gist of Idea
Wherever there is painless contradiction there is also comedy
Source
Søren Kierkegaard (Concluding Unscientific Postscript [1846], p.459), quoted by Terry Pinkard - German Philosophy 1760-1860 13
Book Reference
Pinkard,Terry: 'German Philosophy 1760-1860' [CUP 2002], p.354
A Reaction
He is not saying that this is the only source of comedy. I once heard an adult say that there is one thing that is always funny, and that is a fart.