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.