Coining a word that is as fitting as it is symptomatic of the urge it describes, Warburg spoke of his Verknüpfungszwang. This ‘compulsion to interconnect’ lies not only at the root of his research and working methods.

Apophenia (/æpoʊˈfiːniə/) is the tendency to perceive meaningful connections between unrelated things.[1] The term (German: Apophänie from the Greek verb ἀποφαίνειν (apophaínein)) was coined by psychiatrist Klaus Conrad in his 1958 publication on the beginning stages of schizophrenia.[2] He defined it as "unmotivated seeing of connections [accompanied by] a specific feeling of abnormal meaningfulness".[3][4] He described the early stages of delusional thought as self-referential over-interpretations of actual sensory perceptions, as opposed to hallucinations.[1][5]

He even coined a phrase: Verknüpfungszwang - the compulsion to seek connections.