Full Idea
We trust certain rational 'intuitions' in ourselves which dispense with reflection but seem to follow an indisputable logic. (note: it is thought ineffable because reflection is the paradigm of rationality. It is no less rational than reflection).
Gist of Idea
We often trust our intuitions as rational, despite their lack of reflection
Source
Robert C. Solomon (The Passions [1976], 6.4)
Book Reference
Solomon,Robert C.: 'The Passions (1993 ed)' [Hackett 1993], p.182
A Reaction
[compressed] Solomon uses the example to support that emotion is part of rationality. Since this view of intuition is more or less mine (that intuition can be knowledge, when the justification is obscure), it seems to support his claim.