“Shaw said that three years as a theatre critic was the maximum before insanity set in - the implication being that anyone who lasted longer than that was too dull to be unbalanced by his nightly ordeal.”

"On the Cryptic and the Elliptic"
All Things Considered (1908)
Context: For fear of the newspapers politicians are dull, and at last they are too dull even for the newspapers. The speeches in our time are more careful and elaborate, because they are meant to be read, and not to be heard. And exactly because they are more careful and elaborate, they are not so likely to be worthy of a careful and elaborate report. They are not interesting enough. So the moral cowardice of modern politicians has, after all, some punishment attached to it by the silent anger of heaven. Precisely because our political speeches are meant to be reported, they are not worth reporting. Precisely because they are carefully designed to be read, nobody reads them.

Foreword
Tynan Right and Left (1967)

Referring to George Bernard Shaw in While Rome Burns (1934).

"If the philosopher is right"
Red Bird (2008)

The Temptaion of Harringay (1929)

Re John 13:31 (Torrance 1959 edition).
St John

Part 1, section 2.
Murther and Walking Spirits (1991)

Source: Outliers: The Story of Success