The Situationists were a school of anarchists who valued play, imagination and "the revolution of everyday life".
They had some great slogans:
‘I declare a permanent state of happiness.’
‘Be realistic, demand the impossible.’
'Power to the imagination, imagination taking power.’
'Forget everything you’ve been taught. Start by dreaming.’
‘Desiring reality is great! Realising your desires is even better!’
‘Form dream committees.’
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Source:
[[From What Is to What If]]