Full Idea
Being is Thought.
Gist of Idea
Being is Thought
Source
Georg W.F.Hegel (Phenomenology of Spirit [1807], Pref 54)
Book Reference
Hegel,Georg W.F.: 'Phenomenology of Spirit', ed/tr. Miller,A.V. /Findlay,J.N. [OUP 1977], p.33
A Reaction
You won't find a more succinct slogan for idealism than that. Speaking as what Tim Williamson (referring to himself) calls a 'rottweiler realist', I can't quite get the hang of Hegel's claim. What does he think thought is, if it isn't about the world?