Full Idea
Time is measured by the succession of ideas in our minds.
Gist of Idea
Time is measured by the succession of ideas in our minds
Source
George Berkeley (Three Dialogues of Hylas and Philonous [1713], I p.172)
Book Reference
Berkeley,George: 'The Principles of Human Knowledge etc.', ed/tr. Warnock,G.J. [Fontana 1962], p.172
A Reaction
But we distinguish between subjective time (which flies when you are having fun), and objective time, judged from observation of clocks and nature.