Full Idea
After man's interest in breathing freely, the greatest of all his interests (because it never fluctuates or remits….) is his interest in consistency, in feeling that what he now thinks goes with what he thinks on other occasions.
Gist of Idea
Man has an intense natural interest in the consistency of his own thinking
Source
William James (The Pragmatist Account of Truth [1908], 'Seventh')
Book Reference
James,William: 'Selected Writings of William James', ed/tr. Bird,Graham [Everyman 1995], p.89
A Reaction
People notoriously contradict themselves all the time, but I suspect that it is when they get out of their depth in complexities such as politics. They probably achieve great consistency within their own expertise, and in common knowledge.