Central to Michael Polanyi’s thinking was the belief that creative acts (especially acts of discovery) are shot-through or charged with strong personal feelings and commitments (hence the title of his most famous work Personal Knowledge). Arguing against the then dominant position that science was somehow value-free, Michael Polanyi sought to bring into creative tension a concern with reasoned and critical interrogation with other, more ‘tacit’, forms of knowing.

Polanyi’s argument was that the informed guesses, hunches and imaginings that are part of exploratory acts are motivated by what he describes as ‘passions’. They might well be aimed at discovering ‘truth’, but they are not necessarily in a form that can be stated in propositional or formal terms. As Michael Polanyi (1967: 4) wrote in The Tacit Dimension, we should start from the fact that ‘we can know more than we can tell’. He termed this pre-logical phase of knowing as ‘tacit knowledge’. Tacit knowledge comprises a range of conceptual and sensory information and images that can be brought to bear in an attempt to make sense of something (see Hodgkin 1991). Many bits of tacit knowledge can be brought together to help form a new model or theory. This inevitably led him to explore connoisseurship and the process of discovery (rather than with the validation or refutation of theories and models - in contrast with Popper, for example).

We must conclude that the paradigmatic case of scientific knowledge, in which all faculties that are necessary for finding and holding scientific knowledge are fully developed, is the knowledge of approaching discovery.

To hold such knowledge is an act deeply committed to the conviction that there is something there to be discovered. It is personal, in the sense of involving the personality of him who holds it, and also in the sense of being, as a rule, solitary; but there is no trace in it of self-indulgence. The discoverer is filled with a compelling sense of responsibility for the pursuit of a hidden truth, which demands his services for revealing it. His act of knowing exercises a personal judgement in relating evidence to an external reality, an aspect of which he is seeking to apprehend. (Polanyi 1967: 24-5)

Michael Polanyi placed a strong emphasis on dialogue within an open community (a theme taken up later strongly by the physicist David Bohm). He recognized the strength by which we hold opinions and understandings and our resistance to changing them. Unlike many of his contemporaries he placed his thinking within an appreciation of God and of the power of worship - especially in his later writing (see, for example, Meaning). In his earlier work (especially in Personal Knowledge) Polanyi seems to be preoccupied with ’setting forth ways to think about religious meaning as an articulate system or framework related to other articulate systems’ (Mullins undated). Later Michael Polanyi attempted to extend his model to describe the nature of human knowledge found in art, myth and religion.