One is a dictionary (yes, the internet has not diminished my love of reference books). One is a thesaurus (why use ‘flexible’ when ‘pliable’ will do?).

The third is my absolute favourite. The Penguin Dictionary of Quotations is a book I return to most often in support of my work. If I’m struggling to find the right words, I seek out those of others. The pointed, pertinent, pithy and, sometimes, poisonous quotes of scholars, academics, celebrities, authors and educators can, more often than not, get a content creator like myself out of the tightest of editorial corners.

My new pop-up ethical t-shirt business – launched this week at betterbusinessshow.teemill.co.uk – had me reaching for this invaluable tome once more in search of inspirational citations from the great and good of the sustainability world.

And there have been some dynamite proclamations over the years. Here’s my 10 favourites.