There are three things which are real: God, human folly, and laughter. Since the first two pass our comprehension, we must do what we can with the third.

Aubrey Menen (1912–1989) British writer, novelist, satirist, theatre critic

Rama Retold, Book 3, ch. 7 [Valmiki] (1954)
    (Source)

This book is a modern retelling of part of the Ramayana.

A variant of this was inscribed on a silver beer mug given on a gift that President John F Kennedy gave to David Powers:

There are three things which are real:
God, human folly and laughter.
The first two are beyond our comprehension
So we must do what we can with the third.