Full Idea
Belief happens as little in terms of reasons as tasting and smelling.
Gist of Idea
Belief is no more rational than is tasting and smelling
Source
J.G. Hamann (works [1770], v2:74), quoted by Andrew Bowie - Introduction to German Philosophy
Book Reference
Bowie,Andrew: 'Introduction to German Philosophy' [Polity 2003], p.46
A Reaction
That is one idea definitively expressed! I take it as only a partial truth. Beliefs happen as a result of observation and experience. But someone can draw our attention to something (and we can hunt it out ourselves), which is giving a reason for belief.