Here is Adorno in the fragment titled “Memento”:
A first precaution for writers: in every text, every piece, every paragraph to check whether the central motif stands out clearly enough. Anyone wishing to express something is so carried away by it that he ceases to reflect on it. Too close to his intention, “in his thoughts,”he forgets to say what he wants to say.
From Brian Dillons Essayism 📝📚